Question

A lift of mass $1000Kg$ which is moving with acceleration of $1m/s^{-2}$ 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. $10,000N$

Answer 1

The correct option is B $10,800N$

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

The tension developed in string is given as,

$T=mg+ma$

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

$=10800N$

Thus, the tension developed in the string is $10800N$.