In which of the following situations the force applied by the weight of a person becomes zero in a lift

• A. Lift moves up with an acceleration of 9.8 meter per sq. second
• B. Lift moves down with an acceleration of 9.8 meter per sq. second
• C. Lift moves up with an speed of 9.8 meter per second
• D. Lift moves up with down speed of 9.8 meter per second