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/s at the end of 1 s?
From given statementm mass of body = 2 kg, initial velocity = u = 0 m/s and final velocity = v = 30 m/s.
At time (t) = 1 sec
Acceleration = (v-u)/t = 30 m/s2
So, force = ma = 2×30 = 60N.