Question

A bag of wheat weighs 100 kg. To what height should it be raised, so that its potential energy may be 9800 J (g = 9.8 m $s^{-2}$).

• A. 2
• B. 100
• C. 50
• D. 0

Answer 1

The correct option is B 100

We know that,

$U=mgh$

$9800=100\times 9.8\times h$

$h=\frac{9800}{100\times 9.8}m$

$h=\frac{9800}{98}m$

$h=100m$