Question

A car of mass 900 kg is moving with a velocity of 72km/hr. The driver applied brake and the car stops after 3 seconds. a. What is the retardation of the car?
b. Calculate the distance covered by the car.
c. Calculate the force needed to stop the car.​

Answer 1

Answer:

Mass of the car =2400 kg

Initial velocity u=20 m/s

Final velocity v=0 m/s

Time t=10s

Retardation a=tv−u=100−20=−2m/s2

Force =m×a=2400×2=−4800N.

Explanation:

please follow