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(a) How long will it take a 850 kg car with a useful power output of 40.0 hp (1hp = 746 W) to reach a speed of 15.0 m/s, neglecting friction?
(b) How long will this acceleration take if the car also climbs a 3.00 m high hill in the process?
A 42.0 kg child standing on a frozen pond throws a 0.500 kg stone to the east with a speed of 6.00 m/s. Neglecting friction between child and ice, find the recoil velocity of the child. (Assume east is the positive direction.)
A crate of mass m =32 kg rides on the bed of a truck attached by a cord to the back of the cab as in the figure. The cord can withstand a maximum tension of 68N before breaking. Neglecting friction force between the crate and truck bed, find the maximum acceleration of the truck can have before the cord breaks.