Q: A 2 kg block is pressed against a rough wall by a force F = 20 N as shown in figure. Find acceleration of the block and force of friction acting on it. (Take g = 10m/s²)
(a) 4 ms-2 ↓ ;15N↑
(b) 4ms-2↑ ;12N↑
(c) 8ms-2↓ ;10N↑
(d) 4ms-2↓ ;12N↑
Ans: (d)