Question

a body is moving with a velocity of 20 meter per second is apply abrack such that it stop in 2 second mass of body is 20 kg find the forse appley by brack

Answer 1

V = Vo + a*t. V = 0, Vo = 20 m/s, t = 2 s., a = ?. "a" will be negative.

F = M*a.

F will be negative which means that the force is opposing the movement.