Question

A car is moving with speed 54km/h. It stop in 5m after applying the breaks. find the force on the car by the road. If mass of the car is 200kg.​

Answer 1

u = 54 km/h = 15 m/s

v = 0

t = 5 sec

m = 200 kg

F = ?

a = (v-u)/t = (0-15)5 = -75 m/s^2

F = ma

= 200 × -75

= - 15000 N