(a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 98.0 km/h? (Enter a number.) 37.8 (b) If, in actuality, a 750 kg car with an initial speed of 98.0 km/h is observed to coast up a hill to a height 16.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) X 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.) XN
(a) How high (in m) a hill can a car coast up (engine disengaged) if friction is negligible and its initial speed is 98.0 km/h? (Enter a number.) 37.8 (b) If, in actuality, a 750 kg car with an initial speed of 98.0 km/h is observed to coast up a hill to a height 16.0 m above its starting point, how much thermal energy (in J) was generated by friction? (Enter a number.) X 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.) XN
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VIEWStep 2: (a) Find the expression for the initial and the final energy of the system:
VIEWStep 3: Find the maximum height:
VIEWStep 4: (b) Find the expression for the initial and the final energy of the system:
VIEWStep 5: Calculate the thermal energy lost due to friction:
VIEWStep 6: (c) Find the average friction force:
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