You throw a 3.00 N rock vertically into the air from ground level. You observe that when it is 12.0 m above the ground, it is traveling at 25.0 m/s upward. Use the work-energy theorem to find the rock's speed just as it left the ground. Express your answer with the appropriate units. v2 = Submit Part B μA hmax = Value Request Answer Use the work-energy theorem to find its maximum height. Express your answer with the appropriate units. μA Units Value ? Units ?

You throw a 3.00 N rock vertically into the air from ground level. You observe that when it is 12.0 m above the ground, it is traveling at 25.0 m/s upward. Use the work-energy theorem to find the rock's speed just as it left the ground. Express your answer with the appropriate units. v2 = Submit Part B μA hmax = Value Request Answer Use the work-energy theorem to find its maximum height. Express your answer with the appropriate units. μA Units Value ? Units ?

Name: You throw a 3.00 N rock vertically into the air fromground level. You
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Description: You throw a 3.00 N rock vertically into the air fromground level. You observe that when it is 12.0 mabove the ground, it is traveling at 25.0 m/supward.Part AUse the work-energy theorem to find the rock's speed just as it left theground.Express your

University Physics Volume 1

18th Edition

ISBN:9781938168277

Author:William Moebs, Samuel J. Ling, Jeff Sanny

Publisher:William Moebs, Samuel J. Ling, Jeff Sanny

Chapter7: Work And Kinetic Energy

Section: Chapter Questions

Problem 71P: (a) What is the average useful power output of a person who does 6.00106J of useful work in 8.00 h?...

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Similar questions

(a) How long will it take an 850-kg car with a useful power output of 40.0 hp (1hp=746W) 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?
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A 100 — kg man is skiing across level ground at a speed of 8.0 m/s when he comes to the small slope 1.8 m higher than ground level shown in the following figure. (a) If the skier coasts up the bill, what is his speed when he reaches the top plateau? Assume friction between the snow and skis is negligible. (b) What is his speed when he reaches the upper level if an 80 — N frictional force acts on the skis?
. In the annual Empire State Building race, contestants run up 1,575 steps to a height of 1,050 ft. In 2003, Australian Paul Crake completed the race in a record time of 9 min and 33 S, Mr., Crake weighed 143 lb (65 kg) , (a) How much work did Mr., Crake do in reaching the top of the building? (b) What was his average power output (in ft-lb/s and in hp)?
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a shopper in a supermarket pushes a cart with a force of 35 N directed at an angle of 25 below the horizontal. The force is just sufficient to overcome various frictional forces, so the cart moves at constant speed, (a) Find the work done by the shopper as she moves down a 50.0-m length aisle, (b) What is the net work done on the cart? Why? (c) The shopper goes down the next aisle, pushing horizontally and maintaining the same speed as before. If the work done by frictional forces doesnt change, would the shoppers applied force be larger, smaller, or the same? What about the work done on the cart by the shopper?
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