Question

A car of mass 480 kg moving at a speed of 15m/s is stopped by applying brakes in 10s. Calculate the force applied by the brakes.

Answer 1

Answer:

a=v-u/t

a=0-15/10

a=-1.5m/s²

Now;F=M*A

F=480*1.5=720N

Answer 2

Explanation:

m=480kg

v=15m/sec

t=10sec.

a=v/t=15/10=1.5m/sec^2

Acc. to 2nd law of motion

F=ma

F=480×1.5=720N