Question 76
What will be the force required to increase the velocity of body of mass 2kg from 6m/s to 12m/s in 3 seconds?
Step-by-Step Solution
Detailed Explanation:
Initial velocity $u = 6 m/s$, final velocity $v = 12 m/s$, time $t = 3 s$, and mass $m = 2 kg$.
Acceleration a = (v - u)/t = (12 - 6)/3 = 2 m/s².
By Newton's second law, $F = ma = 2 \times 2 = 4 N$.
Therefore, the correct answer is 4 N.