Constants Part A A driver with a 0.80-s reaction time applies the brakes, causin

Question

Constants Part A A driver with a 0.80-s reaction time applies the brakes, causing the car to have acceleration opposite the direction of motion. Assume the acceleration is equal to -7.0 m/s2 If the car is initially traveling at 21 m/s, how far does the car travel during the reaction time? Express your answer to two significant figures and include the appropriate units Value Units Submit uest Answe Part B How far does the car travel after the brakes are applied and while skidding to a stop? Express your answer to two significant figures and include the appropriate units Zb =1 Value Units Submit uest Answer

Explanation / Answer

here ,

part a)

during the reaction time

as the speed is constant

distance travelled = 0.80 * 21

distance travelled = 16.8 m

b)

when the brakes are applied

distance travelled = u^2/(2 * a)

distance travelled = 21^2/(2 * 7)

distance travelled = 31.5 m

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