A) 69 N upwards
B) 69 N downwards
C) 29 N upwards
D) 29 N downwards
Correct Answer: C
Solution :
If we do not apply any force on a body in upward direction, it will fall down with an acceleration\[g\]. If we apply a certain force on the body in downwards direction, it will fall with an acceleration greater than\[g\]. Now force applied in upward direction,\[T=m(g-a)\] On solving we obtain the correct option as . It is also interesting to note that if a force of \[69\] Newtons is applied in upward direction on the body of weight \[5\times 9\cdot 8\text{ }i.e.,\text{ }49\] Newton?s, the body will be lifted upwards with accelerated movement.
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