Question

A car of mass 1000kg travelling at 30 m/s stop after a distance of 50m decelerating uniformly. What is the force exerted by it on the brakes? What is the work done by the brakes? (it's physics question)

Answer 1

Answer:

Step-by-step explanation:

mass= 1000

initial velocity= u= 30

final velocity= v= 0

distance= s= 50

as we know

v²= u²+ 2as

0²= 30² + 2 a 50

-900= 100a

a= -9

And F= ma

F= 1000 x -9

F= -9000N

W= Fs

W= -9000 x 50

= -450 KJ

Answer 2

here is your answer

I hope it helps....