A 4kg ball travelling with a speed of 5m/s strikes wall normally and r – McqOptions

MCQOPTIONS

1.	A 4kg ball travelling with a speed of 5m/s strikes wall normally and rebounds with the same speed. If the ball is in contact with the wall for 0.05s, average force exerted on the wall is
A.	400N
B.	600N
C.	800N
D.	1000N
Answer» D. 1000N

Discussion

No Comment Found

Related MCQs

A spacecraft of mass 2000 kg moving with a velocity of 600 m/s suddenly explodes into two pieces. One piece of mass 500 kg is left stationary. The velocity of the other part must be (in m/s)
A boxer moves his head backwards when the opponent gives a punch to his head, so as to:
A mass of 4 kg moving at 3 m/s collides with a mass of 6 kg moving at 2 m/s in the opposite direction and they stick together. The combined mass has velocity of:
A metal ball with the momentum mv strikes a wall and bounces back. The change in the ball's momentum is ideally
A ball of mass 150 g moving with an acceleration 20 m/s2 is hit by a force which acts on it for 0·1 s. The impulse is
If the kinetic energy and momentum of an object of mass m are k and p respectively, then the relation between kinetic energy and momentum will be
A force F acts on a particle for a short time t. The product (F × t) will be equal to the change of
In a perfect elastic collision, the value of the coefficient of restitution is
A particle of mass ‘m’ is moving with speed ‘2v’ and collides with a mass ‘2m’ moving with speed ‘v’ in the same direction. After collision, the first mass is stopped completely while the second one splits into two particles each of mass ‘m’, which move at angle 45° with respect to the original direction.The speed of each of the moving particle will be:
A rocket moves because of the conservation of