Solve each question and make sure to complete all the steps 1- In a downhill ski race,
Question:
Solve each question and make sure to complete all the steps
1- In a downhill ski race, surprisingly, little advantage is gained by getting a running start. (This is because the initial kinetic energy is small compared with the gain in gravitational potential energy on even small hills.) To demonstrate this, find the final speed and the time taken for a skier who skies 70.0 m along a 30 slope neglecting friction: (a) Starting from rest. (b) Starting with an initial speed of 2.50 m/s. (c)
Does the answer surprise you? Discuss why it is still advantageous to get a running start in very competitive events.
2-A 60.0-kg skier with an initial speed of 12.0 m/s coasts up a 2.50-m-high rise as shown in Figure 7.39. Find her final speed at the top, given that the coefficient of friction between her skis and the snow is 0.0800. (Hint: Find the distance traveled up the incline assuming a straight-line path as shown in the figure.)
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