Question

a body of mass 2 kg is at rest what should be the magnitude of force which will make the body move with a speed of 30 M per second at the end of one second

Answer 1

F = ma

F = 2 * (30-0)/1

F = 60 N

Hope it helped you...

Answer 2

You are given the following:
Mass of object, m= 2kg
Final velocity, v = 30 m/s
Initial velocity, u = 0
Time taken, t = 1 sec

You need to find the force.
To find force, you need acceleration.

Acceleration, a = (v-u)/t = (30-0)/1 = 30 m/s^2

Now, force = ma = 2×30 = 60 N

So the force acting on it is 60N.