A) 24 N
B) 74 N
C) 15 N
D) 49 N
Correct Answer: A
Solution :
[a] In stationary position, spring balance reading |
= mg = 49 |
\[m=\frac{49}{9.8}=5\,kg\] |
When lift moves downward |
mg - T = ma |
Reading of balance |
T = mg - ma |
= 5 (9.8 5) |
\[=5\times 4.8\] |
= 24.0 N |
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