Question
A bag of wheat weighs 75 kg. Calculate the height to which it should be raised so that its potential energy is 7350 J. (Given g = 9.8 m/s2) [Ans. 10 m]
Answer
Mass (m) = 75 kg
Height (h) = To be calculated
Potential Energy (PE) = 7350 J
Now, PE = mgh
height (h) = PE\over mg
= 7350\over 75 × 9.8
= 10 m