Question

a force of 4n acts on a body of mass 2kg for 4sec assuming the body to be initially at rest ,find:(a)velocity when force stops acting

Answer 1

Given :-

Force acting = F = 4 N

Mass of the body = m = 2 Kg

Time = t = 4 s

As body is initially at rest then its initial Velocity becomes zero.

As we know that Product of mass and acceleration is known as Force.

F = ma

4 = 2a

a = 2 ms-²

Now Using first equation of Motion,

v = u + at

v = 0 + 2 × 4

v = 8 ms-¹

Hence,

The velocity when force will stop acting = 8 ms-¹