A) 24 N
B) 74 N
C) 15 N
D) 49 N
Correct Answer: A
Solution :
When the lift is stationary \[R=mg\] \[49=m\times 9.8\] \[m=\frac{49}{9.8}kg=5\,kg\] If a is downward acceleration of lift. then, \[R=m(g-a)\] \[R=5(9.8-5)=24\text{ }N\]You need to login to perform this action.
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