Work-and-Energy-HW.doc - Pre AP Physics Work and Energy WS...

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Physics for Scientists and Engineers
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Chapter 19 / Exercise 11
Physics for Scientists and Engineers
Jewett/Serway
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Pre AP Physics - Work and Energy WS1.A 196 N suitcase is raised at a constant velocity 3.0 m above a platform by a crane. How much work is done on the suitcase? [588 J]2.A tugboat pulls a ship with a constant net horizontal force of 5000 N and causes the ship to move through the harbor. How much work is done on the ship if it moves a distance of 3.0 km? [1.50 x 10
3.A weight lifter lifts a set of weights a vertical distance of 2.00 m. If a constant net force of 350 N is exerted on the weights, what is the net work done on the weights? [700 J]4.A loaded sled requires a force of 250 N applied horizontally to push it across wet snow. How far can it be pushed with 800 kJ of work? [3200 m]5.The cable of a large crane applies a force of 2.2 x 104N to a demolition ball as it lifts the ball vertically upward a distance of 7.6 m. How much work does this force do on the ball? [1.67 x 10
b. Is the work positive or negative? Explain.6.How much work is done on a vacuum cleaner pulled 3.0 m by a force of 50 N at an angle of 30oabove the horizontal? [129.904 J]7.A shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25odownward from the horizontal. Find the work done by the shopper on the cart as the shopper moves along a 50.0 m length of aisle. [1586.039 J]8.A horse tows a barge in a canal by means of a rope that makes an angle of 15 degrees with the direction of motion of the barge. The tension in the rope is 120 N. How much work is done in moving the barge 1000 m?
9.A child drags a toboggan 30 m across a level snow slope, exerting a force of 100 N on a rope inclined at 30 degrees with the horizontal. How much work is done by the force? [2598 J]10.A worker pushes a 1500 N crate with a horizontal force of 345 N a distance of 24.0 m. The coefficient of frictionbetween the crate and the floor is 0.220. a.How much work is done by the worker on the crate? [8280 J]
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Physics for Scientists and Engineers
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Chapter 19 / Exercise 11
Physics for Scientists and Engineers
Jewett/Serway
Expert Verified

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