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MCQOPTIONS
This section includes 1777 Mcqs, each offering curated multiple-choice questions to sharpen your 9th Class knowledge and support exam preparation. Choose a topic below to get started.
| 1151. |
When a horse pulls a cart, what is the force that helps the horse move forward? |
| A. | The force exerted by the cart on the horse |
| B. | The force exerted by the ground on the horse |
| C. | The force exerted by the ground on the cart |
| D. | The force exerted by the horse on the cart |
| Answer» C. The force exerted by the ground on the cart | |
| 1152. |
A \[60\,\,kg\] man pushes a \[40\,\,kg\] man with a force of 60 N. With what force does the\[~40\,\,kg\] man push the other man? |
| A. | \[40\,\,N\] |
| B. | \[0\,\,N\] |
| C. | \[60\,\,N\] |
| D. | \[20\,\,N\] |
| Answer» D. \[20\,\,N\] | |
| 1153. |
Two bodies with masses \[{{m}_{1}}\] and \[{{m}_{2}}\] \[({{m}_{1}}>{{m}_{2}})\] are joined by a string passing over a fixed pulley. The centres of gravity of the two bodies are initially at the same height. Assume mass of the pulley and weight of the thread negligible. Then the downwards acceleration of \[{{m}_{1}}\] is |
| A. | \[\left( \frac{{{m}_{1}}-{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}} \right)g\] |
| B. | \[{{\left( \frac{{{m}_{1}}-{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}} \right)}^{2}}g\] |
| C. | \[\frac{{{m}_{2}}g}{{{m}_{1}}+{{m}_{2}}}\] |
| D. | \[\frac{{{m}_{1}}g}{{{m}_{1}}+{{m}_{2}}}\] |
| Answer» B. \[{{\left( \frac{{{m}_{1}}-{{m}_{2}}}{{{m}_{1}}+{{m}_{2}}} \right)}^{2}}g\] | |
| 1154. |
A body of mass 1 kg initially at rest, explodes and breaks into three fragments of masses in the ratio 1:1:3. The two pieces of equal masses fly off perpendicular to each other with a speed of 30 m/s each. What is the velocity of the heavier fragment? |
| A. | 10 m/s |
| B. | 20 m/s |
| C. | \[10\sqrt{2}\,\,m/s\] |
| D. | \[20\sqrt{2}\,\,m/s\] |
| Answer» D. \[20\sqrt{2}\,\,m/s\] | |
| 1155. |
\[E,\,\,G\] and \[N\] represent the magnitudes of electromagnetic, gravitational and nuclear forces respectively between two electrons placed apart at a given distance. How are the magnitudes of \[E,\,\,G\] and \[N\] related to each other? |
| A. | \[E>G>N\] |
| B. | \[E>N>G\] |
| C. | \[G>N>E\] |
| D. | \[N>E>G\] |
| Answer» E. | |
| 1156. |
In the arrangement shown in figure below, the ends P and Q of an stretchable string move downwards with uniform speed u. Pulleys A and B are fixed. Mass M moves upwards with a speed |
| A. | \[2u\cos \theta \] |
| B. | \[u\cos \theta \] |
| C. | \[\frac{2u}{\cos \theta }\] |
| D. | \[\frac{u}{\cos \theta }\] |
| Answer» E. | |
| 1157. |
A book is lying on a table. What is the angle between the book on the table and the weight of the book? |
| A. | \[{{0}^{o}}\] |
| B. | \[{{45}^{o}}\] |
| C. | \[{{90}^{o}}\] |
| D. | \[{{180}^{o}}\] |
| Answer» B. \[{{45}^{o}}\] | |
| 1158. |
Three equal weights of mass 2 kg each are hanging on a string passing over a fixed pulley as shown in the fig. What is the tension in the string connecting the weights B and C? |
| A. | Zero |
| B. | 13 N |
| C. | 3.3 M |
| D. | 19.6 N |
| Answer» C. 3.3 M | |
| 1159. |
A body is at rest on the surface of the earth. Which of the following statements is correct? |
| A. | Only the weight of the body acts on it. |
| B. | Only upward force acts on the body. |
| C. | Frictional force acts on the body. |
| D. | Net upward force is equal to the net downward force. |
| Answer» E. | |
| 1160. |
Two blocks made of different metals identical in shape and size are acted upon by equal forces which cause them to slide on a horizontal surface. The acceleration of the second block is found to 10 times that of the first. What is the ratio of the mass of the second to the first? |
| A. | 1 : 10 |
| B. | 1 : 1 |
| C. | 10 : 1 |
| D. | 1 : 5 |
| Answer» B. 1 : 1 | |
| 1161. |
A dish of mass 10 gm is kept horizontally in air by firing bullets of mass 5 g each at the rate of 10 per sec. If the bullets rebound with the same speed, what is the velocity with which the bullets are fired? |
| A. | 49 cm/sec |
| B. | 147 cm/sec |
| C. | 98 cm/sec |
| D. | 196 cm/sec |
| Answer» D. 196 cm/sec | |
| 1162. |
A ball of mass \[100\,\,g\] is moving with a velocity of\[10\,\,m\,\,{{s}^{-1}}\]. The force of the blow by the bat acts for \[0.01\] seconds. What is the force exerted on the ball by the bat? |
| A. | \[100\,\,N\] |
| B. | \[200\,\,N\] |
| C. | \[300\,\,N\] |
| D. | \[400\,\,N\] |
| Answer» C. \[300\,\,N\] | |
| 1163. |
In a rocket, fuel burns at the rate of \[1\text{ }kg\text{ }{{s}^{-1}}\]. This fuel is ejected from the rocket with a velocity of\[60\text{ }km\text{ }{{s}^{-1}}\]. This exerts a force on the rocket equal to |
| A. | 6000 N |
| B. | 60000 N |
| C. | 60 N |
| D. | 600 N. |
| Answer» C. 60 N | |
| 1164. |
A long-jumper runs before jumping to |
| A. | Cover greater distance |
| B. | Maintain momentum conservation |
| C. | Gain energy by running |
| D. | Gain momentum |
| Answer» E. | |
| 1165. |
If no force acts on a body, then what will happen to it? |
| A. | It does not change its shape. |
| B. | It continues to move but with less speed. |
| C. | It changes its direction. |
| D. | It can either remain at rest or continue to move in a straight line. |
| Answer» E. | |
| 1166. |
A bullet of mass A and velocity B is fired into a block of wood of mass C. If loss of any mass and friction be neglected, then velocity of the system must be |
| A. | \[\frac{AB}{A+C}\] |
| B. | \[\frac{A+C}{B+C}\] |
| C. | \[\frac{AC}{B+C}\] |
| D. | \[\frac{A+B}{AC}\] |
| Answer» B. \[\frac{A+C}{B+C}\] | |
| 1167. |
On what principle does a jet engine work? |
| A. | Conservation of linear momentum |
| B. | Conservation of kinetic energy |
| C. | Conservation of angular momentum |
| D. | Conservation of inertia |
| Answer» B. Conservation of kinetic energy | |
| 1168. |
Three identical bodies, each of mass m, are pushed by a force F on a frictionless table as shown in figure. |
| A. | Net force on X is F. |
| B. | Force applied by X on Y is\[\frac{F}{3}\]. |
| C. | Force applied by Y on Z is equal to net force on X. |
| D. | Net force on Y is equal to zero. |
| Answer» D. Net force on Y is equal to zero. | |
| 1169. |
Vehicles are provided with shock absorbers. Which of the following laws of Newton given below explain this? |
| A. | The first law of motion |
| B. | The second law of motion |
| C. | The third law of motion |
| D. | All of the above |
| Answer» C. The third law of motion | |
| 1170. |
A boat of mass 3000 kg, initially at rest is pulled by a force of \[\text{1}.\text{8 x 1}{{0}^{\text{4}}}\] Newton through a distance of 3 m. Assuming that the resistance due to water is negligible, velocity of boat is |
| A. | 6 m/s |
| B. | 8 m/s |
| C. | 9 m/s |
| D. | 11 m/s |
| Answer» B. 8 m/s | |
| 1171. |
A large truck and a car, both moving with a velocity of magnitude v, have a head-on collision and both of them come to halt after that. If the collision lasts for 10 s then (i) The car will experience the greater force of impact exerted by the truck (ii) The truck will experience the greater momentum change (iii) Car will experience the greater average acceleration than truck. |
| A. | Only (i) and (ii) are correct. |
| B. | Only (ii) and (iii) are correct. |
| C. | Only (iii) and (i) are correct. |
| D. | All (i), (ii) and (iii) are correct. |
| Answer» B. Only (ii) and (iii) are correct. | |
| 1172. |
A parachutist of weight w strikes the ground and comes to rest with an upward acceleration of magnitude 3 g. Force exerted on him by the ground during landing is |
| A. | \[2w\] |
| B. | 3 \[w\] |
| C. | 4 \[w\] |
| D. | 5 \[w\] |
| Answer» D. 5 \[w\] | |
| 1173. |
Two bodies collide at the same temperature. Which of the following is conserved? (i) Velocity (ii) Momentum (iii) Kinetic energy |
| A. | Only (i) and (ii) |
| B. | Only (ii) and (iii) |
| C. | Only (i) and (iii) |
| D. | (i), (ii) and (iii) |
| Answer» C. Only (i) and (iii) | |
| 1174. |
Rahul is travelling in a bus moving at a constant speed of \[50\text{ }km\text{ }{{h}^{-1}}\]. At one point of his journey, he throws a ball vertically upwards to a height 40 cm, the ball will fall (Neglect air friction) |
| A. | A short distance behind where he is standing |
| B. | A long distance in front of where he is standing |
| C. | A long distance behind where he is standing |
| D. | At the same spot where he is standing. |
| Answer» E. | |
| 1175. |
A body of mass 2 kg is acted upon by two forces each of magnitude 1 Newton, making an angle of \[60{}^\circ \] with each other. The net acceleration of the body (in\[\text{m}/{{\text{s}}^{\text{2}}}\]) is |
| A. | \[\frac{\sqrt{2}}{3}\] |
| B. | \[\frac{\sqrt{3}}{2}\] |
| C. | 0.5 |
| D. | 1.0 |
| Answer» C. 0.5 | |
| 1176. |
Which of the following are vector quantities? |
| A. | Force |
| B. | Velocity |
| C. | Momentum |
| D. | All of the above |
| Answer» E. | |
| 1177. |
A particle moves in the x-y plane under the action of a force \[\overrightarrow{F}\] such that the value of its linear momentum \[\overrightarrow{P}\] at any time t is \[{{p}_{X}}=2\] cos t and the angle \[\theta \] between \[\overrightarrow{F}\] and \[\overrightarrow{P}\] at any time t will be |
| A. | \[90{}^\circ \] |
| B. | \[0{}^\circ \] |
| C. | \[180{}^\circ \] |
| D. | \[30{}^\circ \] |
| Answer» B. \[0{}^\circ \] | |
| 1178. |
A machine-gun fires 20 bullets per second into a target. Each bullet weight 150 gm and has a speed of 800 m/sec. The force necessary to hold the gun in position is |
| A. | 800 N |
| B. | (6) 1000 N |
| C. | 1200 N |
| D. | 2400 N |
| E. | None of these |
| Answer» F. | |
| 1179. |
A car is moving on a straight road with a speed \[{{V}_{0}}\]. If the coefficient of friction between the tyres and the road is p, the distance travelled by the car before it comes to rest is |
| A. | \[\frac{{{V}_{0}}^{2}}{2\mu g}\] |
| B. | \[\left( \frac{{{V}_{0}}^{2}}{\mu g} \right)\] |
| C. | \[\frac{{{V}_{0}}}{\mu g}\] |
| D. | \[\frac{{{V}_{0}}^{2}}{\mu g}\] |
| Answer» B. \[\left( \frac{{{V}_{0}}^{2}}{\mu g} \right)\] | |
| 1180. |
A monkey is descending from the branch of a tree with constant acceleration. If the breaking strength is 75% of the weight of the monkey, the minimum acceleration with which monkey can slide down without breaking the branch is |
| A. | g |
| B. | \[\frac{3g}{4}\] |
| C. | \[\frac{g}{4}\] |
| D. | \[\frac{g}{2}\] |
| Answer» D. \[\frac{g}{2}\] | |
| 1181. |
A parachutist of weight W strikes the ground with his legs fixed and comes to rest with an upward acceleration of 3 g. Force exerted by him on the ground during landing is |
| A. | W |
| B. | 2W |
| C. | 3W |
| D. | 4W |
| Answer» E. | |
| 1182. |
When a horse pulls a wagon, the force that causes the horse to move forward is the force |
| A. | He exerts on the wagon |
| B. | The wagon exerts on him |
| C. | The ground exerts on him |
| D. | He exerts on the ground. |
| Answer» D. He exerts on the ground. | |
| 1183. |
The force F acting on a particle of mass m is indicated by the force-time graph shown below. The change in momentum of the particle over the time interval from zero to 8 s is |
| A. | 24 N s |
| B. | 20 N s |
| C. | 12 N s |
| D. | 6 N s |
| Answer» D. 6 N s | |
| 1184. |
Due to an impulse, the change in the momentum of a body is\[1.8\,\,kg\,\,m\,\,{{s}^{-1}}\]. If the duration of the impulse is\[0.2\,\,s\], then what is the force produced in it? |
| A. | \[9\,\,N\] |
| B. | \[8\,\,N\] |
| C. | \[7\,\,N\] |
| D. | \[6\,\,N\] |
| Answer» B. \[8\,\,N\] | |
| 1185. |
Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 m/s and 10 m/s respectively collide. Their velocities after the elastic collision will be (in m/s) respectively |
| A. | 0 and 25 |
| B. | 5 and 20 |
| C. | 10 and 15 |
| D. | 20 and 5 |
| Answer» D. 20 and 5 | |
| 1186. |
Six identical balls are lined up along a straight frictionless groove. Two similar balls moving with speed v along the groove collide with this row on extreme left side end. Then |
| A. | One ball from the right end will move on with speed \[\varepsilon \upsilon \], all the other remains at rest |
| B. | Two balls from the extreme right will move on the speed u each and the remaining balls will be at rest. |
| C. | All the balls will start moving to the right with. |
| D. | All the six balls originally at rest will moves on with speed \[\frac{\upsilon }{6}\] each and the two incident ball will come to rest. |
| Answer» C. All the balls will start moving to the right with. | |
| 1187. |
A block of mass 0.1 kg is held against a wall by applying a horizontal force of 5 N on the lock. If the coefficient of friction between the block and the wall is 0.5, the magnitude of the frictional force acting on the block is |
| A. | 2.5 N |
| B. | 0.98 N |
| C. | 4.9 N |
| D. | 0.49 N |
| Answer» B. 0.98 N | |
| 1188. |
A mass m rest on a horizontal surface. The coefficient of friction between the mass and the surface is p. If the mass is pulled by a force P 3. shown in the figure, the limiting friction between mass and the surface will be |
| A. | \[\mu \,mg\] |
| B. | \[\mu \,\left[ mg-\left( \frac{\sqrt{3}}{2} \right)F \right]\] |
| C. | \[\mu \,\left[ mg-\left( \frac{F}{2} \right) \right]\] |
| D. | \[\mu \,\left[ mg+\left( \frac{F}{2} \right) \right]\] |
| Answer» D. \[\mu \,\left[ mg+\left( \frac{F}{2} \right) \right]\] | |
| 1189. |
Pushing force making an angle \[\theta \]to the horizontal is applied on a block of weight W placed on a horizontal table. If the angle of friction is\[\phi \] , the magnitude of force required to move the body is equal to |
| A. | \[\frac{W\,\cos \phi }{\cos \,(\theta -\phi )}\] |
| B. | \[\frac{W\,\sin \phi }{\cos \,(\theta -\phi )}\] |
| C. | \[\frac{W\,\tan \phi }{\sin (\theta -\phi )}\] |
| D. | \[\frac{W\,\sin \phi }{g\sin (\theta -\phi )}\] |
| E. | None of these |
| Answer» F. | |
| 1190. |
A body of mass 60 kg is dragged with just enough force to start moving on a rough surface with coefficients of static and kinetic frictions 0.5 and 0.4 respectively. On applying the same force, what is the acceleration? |
| A. | \[0.\text{98 m}/{{\text{s}}^{\text{2}}}\] |
| B. | \[\text{9}.\text{8 m}/{{\text{s}}^{\text{2}}}\] |
| C. | \[0.\text{54 m}/{{\text{s}}^{\text{2}}}\] |
| D. | \[\text{5}.\text{292 m}/{{\text{s}}^{\text{2}}}\] |
| Answer» B. \[\text{9}.\text{8 m}/{{\text{s}}^{\text{2}}}\] | |
| 1191. |
A block has been placed on an inclined plane. The slope angle 6 of the plane is such that the block slides down the plane at a constant speed. The coefficient of kinetic friction is equal to |
| A. | \[\sin \,\,\theta \] |
| B. | \[\cos \,\,\theta \] |
| C. | \[g\] |
| D. | \[\tan \,\,\theta \] |
| Answer» E. | |
| 1192. |
A block of mass 2 kg is placed on the floor. The coefficient of static friction is 0.4. If a force of 2.8 N is applied on the block parallel to the floor, the force of friction between the block and floor \[\left( \text{taking g }=\text{ 1}0\text{ m}/\text{se}{{\text{c}}^{\text{2}}} \right)\] is |
| A. | 2.8 N |
| B. | 8N |
| C. | 2N |
| D. | Zero |
| Answer» B. 8N | |
| 1193. |
Two mass A and B each of mass M are fixed together by a massless spring A force F acts on the mass B as shown in figure. At the instant shown, the mass A has acceleration a. What is the acceleration of mass B ? |
| A. | \[\left( \frac{F}{M} \right)-a\] |
| B. | \[a\] |
| C. | \[-a\] |
| D. | \[\left( \frac{F}{M} \right)\] |
| Answer» B. \[a\] | |
| 1194. |
Read the given statements and select the correct option. Statement 1: If we push a massive truck parked along the roadside, it will not move. Statement 2: Two opposite and equal forces acted on two bodies in contact cancel each other. |
| A. | Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. |
| B. | Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. |
| C. | Statement 1 is true but statement 2 is false. |
| D. | Statement 1 is false but statement 2 is true. |
| Answer» D. Statement 1 is false but statement 2 is true. | |
| 1195. |
In the above problem, during a push |
| A. | Acceleration of A is greater than that of B |
| B. | Acceleration of A is less than that of B |
| C. | Neither is accelerated |
| D. | Their accelerations are equal in magnitude but opposite in direction |
| Answer» C. Neither is accelerated | |
| 1196. |
A mass of \[2\,\,kg\] at rest travels for \[4\] seconds with an acceleration of\[1.5\,\,m\,\,{{s}^{-2}}\]. Find the gain of the momentum of the body. |
| A. | \[5\,\,kg\,\,m\,\,{{s}^{-1}}\] |
| B. | \[10\,\,kg\,\,m\,\,{{s}^{-1}}\] |
| C. | \[12\,\,kg\,\,m\,\,{{s}^{-1}}\] |
| D. | \[14\,\,kg\,\,m\,\,{{s}^{-1}}\] |
| Answer» D. \[14\,\,kg\,\,m\,\,{{s}^{-1}}\] | |
| 1197. |
A boy sitting on the top most berth in the compartment of a train which is just joint to stop on a railway station, drops an apple aiming at the open hand of his brother situated vertically below his hands at a distance of about 2m. The apple will fall |
| A. | In the hand of his brother. |
| B. | Slightly away from the hands of his brother in the direction of motion of the train. |
| C. | Slightly away from the hands of his brother in the direction opposite to the direction of motion of the train. |
| D. | None of the above. |
| Answer» C. Slightly away from the hands of his brother in the direction opposite to the direction of motion of the train. | |
| 1198. |
Which one of the following statement does not hold good when two balls of masses \[{{m}_{1}}\] and \[{{m}_{2}}\] undergo elastic collision? |
| A. | When \[{{m}_{1}}<{{m}_{2}}\] and \[{{m}_{2}}\] at rest, there will be maximum transfer of momentum. |
| B. | When \[{{m}_{1}}={{m}_{2}}\] and \[{{m}_{2}}\] at rest, there will be maximum transfer of K.E. |
| C. | When collision is oblique and \[{{m}_{2}}\] at rest with \[{{m}_{1}}={{m}_{2}}\], after collision the ball moves in opposite direction. |
| D. | None of these |
| Answer» D. None of these | |
| 1199. |
A ball of mass 0.2 kg moves with a velocity of 20 m/s and it stops in 0.1 s, then the force on the ball is |
| A. | 40 N |
| B. | 20 N |
| C. | 4N |
| D. | 2 N |
| Answer» B. 20 N | |
| 1200. |
It is easier to draw up wooden block along an inclined plane than have it up vertically, principally because |
| A. | The friction is reduced |
| B. | The mass becomes smaller |
| C. | Only a part of weight has to be overcome |
| D. | g becomes smaller. |
| Answer» D. g becomes smaller. | |