Question

A car is moving with a velocity of 144km/h and it takes 4 s to stop after the brakes are applies calculate the force exerted by the brakes on the car if it' s mass along wth the passenger is 2000kg

Answer 1

initial velocity= 144kmph= 40m/s
final velocity= 0
apply v=u+at
then a=-10m/s²
mass= 2000kg
force= ma= 2×10⁴