Aball rolls onto the path of your car as you drive down a quiet neighborhood street. to avoid hitting the child that runs to retrieve the ball, you apply your brakes for 1.05 s. the car slows down from 15.0 m/s to 9.00 m/s. the mass of the car is 1250 kg. (a) during the time the brakes were applied, what was the average force (in n) exerted on your car?

F = 7.143 kN

Explanation:

given,

time taken to apply break = 1.05 s

car slows down from 15 m/s to 9 m/s

mass of the car = 1250 Kg

force is equal to the change in momentum with respect to time.

F = -7142.85 N

F = - 7.143 kN

Force is acting opposite direction of velocity of car i.e. the sign is negative.

i think it's 35 meters

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach