A) 9800 N
B) 10800 N
C) 11000 N
D) 10000 N
Correct Answer: B
Solution :
Key Idea: The tension in the string during upward motion increases from weight of life due to its upward acceleration. |
When lift moves upward with same acceleration then |
\[Tmg=ma\] |
or \[T=m\text{ }(g+a)\] |
Given, \[m=1000\text{ }kg,\text{ }a=1\text{ }m/{{s}^{2}},\text{ }g=9.8\text{ }m/{{s}^{2}}\] |
Thus, \[T=1000\text{ }(9.8+1)\] |
\[=1000\times 10.8\] |
\[=10800\text{ }N\] |
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