A 70 kg skier is traveling at 25 m/s downhill at point A, which is 80 m above the base, as shown. The surface is rough with 4 = .15 and ø= 20°. a. What is the initial mechanical energy of the skier? b. How fast is she traveling at the bottom of the hill? c. If she continues moving along the horizontal surface with the same 4, how far will she travel before coming to rest? A

A 70 kg skier is traveling at 25 m/s downhill at point A, which is 80 m above the base, as shown. The surface is rough with 4 = .15 and ø= 20°. a. What is the initial mechanical energy of the skier? b. How fast is she traveling at the bottom of the hill? c. If she continues moving along the horizontal surface with the same 4, how far will she travel before coming to rest? A

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter7: Work, Energy, And Energy Resources

Section: Chapter Questions

Problem 3PE: (a) Calculate the work done on a 1500-kg elevator car by its cable to lift it 40.0 m at constant...

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Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.

Question

4. A 70 kg skier is traveling at 25 m/s downhill at point A, which is 80 m above the
base, as shown. The surface is rough with 4 = .15 and ø= 20°.
What is the initial mechanical energy of the skier?
b. How fast is she traveling at the bottom of the hill?
c. If she continues moving along the horizontal surface with the same 4,
how far will she travel before coming to rest?
a.
A

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