Problem 1: Suppose a car approaches a hill and has an initial speed of 114 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. Part (a) If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible? Numeric : A numeric value is expected and not an expression. ho = Part (b) If, in actuality, a 750-kg car with an initial speed of I14 km/h is observed to coast up a hill and stops at a height 21 m above its starting point, how much thermal energy was generated by friction in J? Numeric : A numeric value is expected and not an expression. Ef= Part (c) What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.9° above the horizontal? Numeric : A numeric value is expected and not an expression. IFd =,
Problem 1: Suppose a car approaches a hill and has an initial speed of 114 km/h at the bottom of the hill. The driver takes her foot off of the gas pedal and allows the car to coast up the hill. Part (a) If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is negligible? Numeric : A numeric value is expected and not an expression. ho = Part (b) If, in actuality, a 750-kg car with an initial speed of I14 km/h is observed to coast up a hill and stops at a height 21 m above its starting point, how much thermal energy was generated by friction in J? Numeric : A numeric value is expected and not an expression. Ef= Part (c) What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.9° above the horizontal? Numeric : A numeric value is expected and not an expression. IFd =,
Transcribed Image Text:Problem 1: Suppose a car approaches a hill and has an initial speed of 114 km/h at the bottom of the hill. The driver takes her foot
off of the gas pedal and allows the car to coast up the hill.
Part (a) If the car has the initial speed stated at a height of h = 0, how high, in meters, can the car coast up a hill if work done by friction is
negligible?
Numeric : A numeric value is expected and not an expression.
ho =
Part (b) If, in actuality, a 750-kg car with an initial speed of 114 km/h is observed to coast up a hill and stops at a height 21 m above its starting
point, how much thermal energy was generated by friction in J?
Numeric : A numeric value is expected and not an expression.
Part (c) What is the magnitude of the average force of friction, in newtons, if the hill has a slope 2.9° above the horizontal?
Numeric : A numeric value is expected and not an expression.
IFl =
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