Question

An object of mass 14 kg is placed at a certain height from the ground. If the potential energy of the object is 560 J, then find the height of the object with reference to the ground. (take g = 10 ms^-2)

1. 3 m
2. 4 m
3. 4.5 m
4. 5 m

Answer 1

Correct Answer - Option 2 : 4 m

The correct answer is 4 m.

Ep = mgh

Here, Ep= Potential energy

          m= mass

          g= Gravitational field strength

          h= Vertical height

Given-

Mass of the body= 14 kg

Ep= 560 J

'g' = 10 ms-2

Putting these values in the formula mentioned above, we get-

Ep= mgh

560= 14×10×h

Therefore, h = 560/ 140

               = 4 m