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Question

A lift of mass $$1000 \ Kg$$ which is moving with acceleration of $$1 m/s^{-2}$$ in upward direction, then the tension developed in string which is connected to lift is : -


A
9,800N
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B
10,800N
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C
11,000N
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D
10,000N
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Solution

The correct option is B $$10,800 N$$

The mass of the lift is $$1000\;{\rm{kg}}$$, the acceleration is $$1\;{\rm{m/}}{{\rm{s}}^{\rm{2}}}$$ and the acceleration due to gravity is $$9.8\;{\rm{m/}}{{\rm{s}}^{\rm{2}}}$$.

The tension developed in string is given as,

$$T = mg + ma$$

$$ = 1000 \times 9.8 + 1000 \times 1$$

$$ = 10800\;{\rm{N}}$$

Thus, the tension developed in the string is $$10800\;{\rm{N}}$$.


Physics

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