Your friend (mass 60.0 kg ) is standing on the ice in the middle of a frozen pon
ID: 1866139 • Letter: Y
Question
Your friend (mass 60.0 kg ) is standing on the ice in the middle of a frozen pond. There is very little friction between her feet and the ice, so she is unable to walk. Fortunately, there is a light rope tied around her waist and you stand on the bank holding the other end. You pull on the rope for 3.50 s and accelerate your friend from rest to a speed of 5.40 m/s while you remain at rest.
Part A
What is the average power supplied by the force you applied?
Your friend (mass 60.0 kg ) is standing on the ice in the middle of a frozen pond. There is very little friction between her feet and the ice, so she is unable to walk. Fortunately, there is a light rope tied around her waist and you stand on the bank holding the other end. You pull on the rope for 3.50 s and accelerate your friend from rest to a speed of 5.40 m/s while you remain at rest.
Part A
What is the average power supplied by the force you applied?
Explanation / Answer
W = 1/2 m (v22 - v12)
P = W / t
= m (v22 - v12) / 2 t
= [60(5.402 - 0)] / [2 * 3.5]
average power supplied = 250 W
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.