A) body will move in forward direction if F = 5 N
B) body will move in backward direction with acceleration 0.5 m/s2, if force F = 3 N
C) If F = 3 N then body will be in rest condition
D) Both (a) and (b) are correct
Correct Answer: D
Solution :
For moving die body, applied force should be greater or equal to limiting friction (ie,\[\mu \]N). The limiting friction is \[{{f}_{2}}=\mu N\] \[=\mu mg\] \[=0.2\times 2\times 9.8=3.92\ N\] Since, applied force F = 5 N, so body starts to move in forward direction. Here, applied force is lesser than limiting friction. So, body does not move. If F = 3N, then body will be in rest condition. The reason is same as .
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