A 95 kg person stands on bathroom scales in a lift. The lift starts moving downwards with an acceleration of 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 55 kg crate is pulled across a floor by a horizontal rope. The coefficient of kinetic friction is 0.3. Use g = 9.81 m/s². What pulling force F gives the crate an acceleration of 1.25 m/s²?
An 18 kg block slides down a slope at 30° to the horizontal. The coefficient of kinetic friction is 0.1. Use g = 9.81 m/s². Find the acceleration a of the block along the slope.
A 15 kg sled is pulled across level snow by a rope at 35° above the horizontal with a force of 90 N. The coefficient of kinetic friction is 0.3. Use g = 9.81 m/s². Find the acceleration a of the sled.
A 4.5 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 0.3. Use g = 9.81 m/s². Find the tension T in the string.
A 1.5 kg block on a horizontal table is connected by a light string over a frictionless pulley to a hanging 3 kg mass. The table is frictionless. Use g = 9.81 m/s². Find the tension T in the string.
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