A 2 kg block is pulled on a horizontal frictionless surface by a constant force. If the block accelerates at $3m/{\mathrm{s}}^2$, what is the magnitude of the net force acting on it? ① 5 N ② 6 N ③ 7 N ④ 9 N

Step-by-step solution

1. Identify the mass $m=2\mathrm{kg}$ and acceleration $a=3m/{\mathrm{s}}^2$.
2. Use Newton’s second law $F=ma$ to find the net force.
3. Compute $F=2\times 3=6\mathrm{N}$.
4. Select option ② as the correct answer.

Concept tested: Newton's Second Law

Published 1 October 2026 · How this solution was prepared and checked