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
B
10,800N
C
11,000N
D
10,000N

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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