Question

. A car of mass 480 kg moving at a speed of
54 km h-1 is stopped by applying brakes in
10 s. Calculate the force applied by the brakes.
Ans. 720 N​

Answer 1

Answer:

u=54 kmph=  54×1000 /3600m/s=15 m/s

v=0

and, t=10 s

So, a=v−u/t

=15−0 /10

=1.5 m/s  

Mass, M=480 kg

So, force: F=480×1.5=720 N

STAY HOME STAY SAFE

Explanation: