A 90 kg person stands on bathroom scales in a lift. The lift is moving downwards and slowing down at 2 m/s². Use g = 9.81 m/s². Find the force N the scales exert on the person (the scale reading in newtons).
A 30 kg crate is pulled across a floor by a horizontal rope. The coefficient of kinetic friction is 0.1. Use g = 9.81 m/s². What pulling force F gives the crate an acceleration of 2.5 m/s²?
A box slides across a level floor with an initial speed of 5 m/s and comes to rest after 6.4 m. Use g = 9.81 m/s². Find the coefficient of kinetic friction μ.
Masses of 10 kg and 2.5 kg hang on either side of a light, frictionless pulley, connected by a light string. The system is released from rest. Use g = 9.81 m/s². Find the tension T in the string.
A block is given a push so that it starts sliding up a ramp at 35° with a speed of 3 m/s. The coefficient of kinetic friction is 0.1. Use g = 9.81 m/s². How far d along the ramp does it slide before it stops?
A 4 kg block on a horizontal table is connected by a light string over a frictionless pulley to a hanging 2.5 kg mass. The coefficient of kinetic friction between block and table is 0.2. Use g = 9.81 m/s². Find the tension T in the string.
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