New Worksheet - Physics - Force, Work, and Power - Part 2

Problem 1
Jane climbs to the top of a 19 meter rope in 88.5 seconds. If Jane weighs 49 kg, how much power must she deliver to complete the task?
Answer: _______________________

Problem 2
Rachel climbs to the top of a 15 meter rope in 71.5 seconds. If Rachel weighs 53 kg, how much power must she deliver to complete the task?
Answer: _______________________

Problem 3
Find the kinetic energy of a 758 kg roller coaster that is moving with a velocity of 17.14 m/s.
Answer: _______________________

Problem 4
Find the kinetic energy of a 692 kg roller coaster that is moving with a velocity of 15.32 m/s.
Answer: _______________________

Problem 5
A runner covers one lap of a circular track, which is 50.0 m in diameter, in 59.3 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________

Problem 6
A runner covers one lap of a circular track, which is 72.0 m in diameter, in 84.7 s. For that lap,what was his average speed? What was his average velocity?
Answer: _______________________

Problem 7
A car traveling at 94 km/hr comes to a stop after 192 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________

Problem 8
A car traveling at 73 km/hr comes to a stop after 201 m. Find the car’s average acceleration. Be sure your final answer is in m/s^2.
Answer: _______________________

Problem 9
A 582 kg crate must be lifted 12.9 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 5642 N is applied to lift the crate at a constant speed. If 57 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________

Problem 10
A 745 kg crate must be lifted 11.7 m into the second story of a building. How much work must be done to move the crate? A block and tackle is used instead and an effort force of 4893 N is applied to lift the crate at a constant speed. If 49 m of rope is pulled through the block and tackle system, what is its efficiency?
Answer: _______________________

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