The brakes of a truck cause it to slow down by applying a retarding force of 3000 N to the truck over a distance of 850 m. What is the work done by this force on the truck?
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Question 2
2.
A 75.0-kg man is riding an escalator in a shopping mall. The escalator moves the man at a constant velocity from ground level to the floor above, a vertical height of 4.60 m. What is the work done on the man by the escalator?
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Question 3
3.
A 0.075-kg arrow is fired horizontally. The bowstring exerts a force on the arrow over a distance of 1.20 m. The arrow leaves the bow at 40 m/s. What average force does the bow apply to the arrow?
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Question 4
4.
A 1500-kg car is driven off a 50-m cliff during a movie stunt. If it was going 20 m/s as it went off the cliff, how fast is it going as it hits the ground?
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Question 5
5.
A 1500-kg car’s brakes failed and it coasts down a hill from rest. The hill is 10 m high and the car has a speed of 12 m/s at the bottom of the hill. How much work did friction do on the car?
