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4.15.9 Lesson: Power Assessment
Started: Dec 3 at 5:23am
Power Assessment

Please complete the following questions based on the previous lesson completed.

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Question 1

12 pts

How much power does a motor have that can lift a 155.0 kg mass to a height of 4.0 m in 55 seconds? Please show your work to earn credit for this question.
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Question 2

12 pts

A tractor pulls a 978 kg wagon at a velocity of 4.9 m/s. How many watts of power are exerted by the tractor motor is the tractor pulls the wagon at a 60 degree angle? Please show your work to earn credit for this question.
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Question 3

12 pts
A force of 852.0 N is required to move a 9000 N boat through the water with a speed of 27 m/s. The boat’s engine is providing energy at a rate of _________ watts. Please show your work to earn credit for this question.
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Question 4

12 pts
A boy and a girl of equal mass race up a flight of steps. If the boy takes 15 seconds to get to the top, and the girl takes 11 seconds, you would say
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The boy does more work and is more powerful

The girl does more work and is more powerful

The girl does less work and is more powerful

The girl does the same amount of work and is more powerful

The boy does the same amount of work and is more powerful

The boy does less work and is more powerful

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Question 5

12 pts

How much power is developed by a truck motor as it pulls a 791.0 N camper at a velocity of 3.0 m/s? Please show your work to earn credit for this question.
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Question 620 pts

A shot putter accelerates a 5 kg shot put from rest to 11.2 m/s in a distance of .5 m. Find the following:
• What is the work done on the shot put?
• What is the force exerted by the shot putter?
• What power did the shot putter use?
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Question 720 pts

A soccer player kicks a .55 kg soccer ball from rest to 3.2 m/s in a distance of .45 m. Find the following:
• What is the work done on the shot put?
• What is the force exerted by the shot putter?
• What power did the shot putter use?
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Answer 1