Question

A vehicle of mass 20 kg is moving with a velocity of 4 ms .find magnitude of the force that is to be applied on the vehicle so that the vehicle have a velocity of 1 ms after travelling a distance of 20 m

Answer 1

we know (final velocity) 2 = (initial velocity)2 +2(product of acceleration and displacement)


so here final velocity is 1m/s and initial velocity is 4m/s and displacement is 20m

so according to the equation

(1)2 = (4)2 + 2*a*20

1 = 16 + 40a

a= -15/40
= -3/8
the acceleration is negative because the velocity is decreasing

force = mass* acceleration
=20*3/8
=7.5 N

Answer 2

Answer:

Hope it helps you .... ..