Question Detail
Question
How long will it take a force of 5 N to increase the velocity of an object of mass 5 kg from 5 m/s to 20 m/s?
Correct Answer
Option B is the correct answer.
Detailed Explanation
Acceleration a = F/m = 5/5 = 1 m/s². Using v = u + at, 20 = 5 + 1×t => t = 15 s.
Hint
First find acceleration from Newton's second law, then use kinematic equation.