How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 94.0 km/h? (Enter a number.) ____ m (b) If, in actuality, a 750 kg car with an initial speed of 94.0 km/h is observed to coast up a hill to a height 18.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) ____ J (c) What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.)  ____N

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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(a)

How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 94.0 km/h? (Enter a number.)
____ m

(b)

If, in actuality, a 750 kg car with an initial speed of 94.0 km/h is observed to coast up a hill to a height 18.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.)
____ J

(c)

What is the average force of friction (down the slope) if the hill has a slope 2.5° above the horizontal? (Enter your answer in N. Enter a number.)
 ____N
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