QUESTION 1 A 82.8-kg skier with an initial speed of 19.5 m/s coasts up a 8.65-m-high rise as shown in Figure. The angle e =35°. Find her final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0520. (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.) Input your answer in m/s using 3 significant figures and exponential notation. V = ? KE,

QUESTION 1 A 82.8-kg skier with an initial speed of 19.5 m/s coasts up a 8.65-m-high rise as shown in Figure. The angle e =35°. Find her final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0520. (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.) Input your answer in m/s using 3 significant figures and exponential notation. V = ? KE,

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 8PE: Suppose the ski patrol lowers a rescue sled and victim, having a total mass of 90.0 kg, down a 60.0°...

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A child of mass m starts from rest and slides without friction from a height h along a curved waterslide (Fig. P5.46). She is launched from a height h/5 into the pool. (a) Is mechanical energy conserved? Why? (b) Give the gravitational potential energy associated with the child and her kinetic energy in terms of mgh at the following positions: the top of the waterslide, the launching point, and the point where she lands in the pool. (c) Determine her initial speed V0 at the launch point in terms of g and h. (d) Determine her maximum airborne height ymax in terms of h, g, and the horizontal speed at that height, v0x. (e) Use the x-component of the answer to part (c) to eliminate from the answer to part (d), giving the height ymax in terms of g, h, and the launch angle . (f) Would your answers be the same if the waterslide were not frictionless? Explain. Figure P5.46
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