Question

Find the force required to stop a car of mass 100 kg with two
csengers each of 50 kg sitting inside, if it is moving at 60 km/
hr speed and takes 5 s to stop.​

Answer 1

Answer:

f=ma

initial velocities u=60km/hr

60×1000/3600=100/6m/s

final velocity v=0

v-u=at

100/6=a×5

a=100/6×5

a=500/6

Force=200×500/6Newton