Question

a force of 50n acting on a certain mass for 3s gives its a velocity of 6m/s. find the mass of the body if the body was initially at rest.

Answer 1

Heya,

Force = 50N
Time = 3s
Initial velocity = 0m/s
Final velocity = 6m/s

Let,
Mass = m

F = ma [where m = Mass and a = acceleration]

We know the value of force but we don't know the value of mass and acceleration.

So to find acceleration,

a = v - u/t [where v = final velocity, u = initial velocity, t = time and a = acceleration]
a = 6 - 0/3
a = 6/3
a = 2m/s^2

To find mass of the body,

F = ma [where F = force]
50 = m × 2
50/2 = m
25 = m

Hope my answer helps you :)

Regards,
Shobana