A body of mass 5 kg is moving with a velocity of 2 m/s. If a force of 10 N acts on the body for 2 s, what will be its final velocity?
Correct: C
Using the equation of motion v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time. First, find the acceleration: a = F/m = 10/5 = 2 m/s^2. Now, v = 2 + 2 × 2 = 6 m/s.