Q 11-04-001NEETEasy
A $5\ \text{kg}$ block on a smooth horizontal floor is pulled by a $20\ \text{N}$ force acting at $60^\circ$ to the horizontal. Its acceleration is
Answer: (B) $2\ \text{m/s}^2$
Concept. On a smooth floor only the horizontal component accelerates the block.
Step 1. Acceleration. $a = \dfrac{20\cos60°}{5} = 2\ \text{m/s}^2$.
Answer. $2\ \text{m/s}^2$ (Option B).
Solution by Sreeraj P, M.Sc Physics