A) 24 s
B) 12 s
C) 6 s
D) will never return to O
Correct Answer: B
Solution :
From Newtons second law F = ma \[\Rightarrow \] \[a=\frac{F}{m}=\frac{10}{1}m/{{s}^{2}}\] Since, the body returns to the point 0 under a force, its displacement is zero. From equation of motion, we have \[s=ut+\frac{1}{2}a{{t}^{2}}\] \[0=60\,t-\frac{1}{2}\times 10\times {{t}^{2}}\Rightarrow \,t=12\,s\]You need to login to perform this action.
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