Question

a car of mass 1000 kg moving with 54km/h stops in 5 minutes .calculate the forse appiled by breakes

Answer 1

$mass = {10}^{3}$
speed=54km/hr
speed=15m/sec.

time=5 minutes=300seconds.


v=u+at
0=15+300a

-15=300a

a=-1/20m/sec^2

now we have find force applied...

so it s

F=Ma
F=1000×(-1/20)

F=-50N

-ve sign because acceleration is negative means object is going towards rest.