A) body will move in forward direction if F= 5N
B) body will move in backward direction with acceleration \[\frac{r_{A}^{2}}{R_{B}^{2}}\], if force F = 3N
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 the body, applied force should be greater or equal to limiting friction (i.e., \[10m/s\]). The limiting friction is \[7m/s\] \[12m/s\] a. 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. The reason is same as . Hence, option is correct.
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