a. Calculate the force needed to bring a 980-kg car to rest from a speed of 76 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). F N b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car. F = N

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Chapter7: Work, Energy, And Energy Resources
Section: Chapter Questions
Problem 12PE: (a) Calculate the force needed to bring a 950-kg car to rest from a speed of 90.0 km/h in a distance...
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a. Calculate the force needed to bring a 980-kg car to rest from a speed of 76 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car.
a. Calculate the force needed to bring a 980-kg car to
rest from a speed of 76 km/h in a distance of 120 m
(a fairly typical distance for a non-panic stop).
F
N
b. Suppose instead the car hits a concrete abutment at
full speed and is brought to a stop in 2.00 m.
Calculate the force exerted on the car.
F =
N
Transcribed Image Text:a. Calculate the force needed to bring a 980-kg car to rest from a speed of 76 km/h in a distance of 120 m (a fairly typical distance for a non-panic stop). F N b. Suppose instead the car hits a concrete abutment at full speed and is brought to a stop in 2.00 m. Calculate the force exerted on the car. F = N
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