Question

A bag of weight 200kg.To what height it should be lifted so its potential energy will be 9800 joules (g=9.8ms-2

Answer 1

Answer:-

h = 5 m

Given :-

m = 200 kg

g = 9.8 m/s²

P. E = 9800 J

To find :-

The height it should be lift.

Solution:-

Let it should lift to be height h.

Potential energy → The energy posses by a body due to its height above the surface of the earth is called potential energy.

$\huge \boxed{P_e = m g h}$

Put the given values,

→$9800 = 200 \times \dfrac{98}{10}\times h$

→$9800 = 20 \times 98 \times h$

→$9800 = 1960h$

→$h = \dfrac{9800}{1960}$

→$h = 5 m$

hence,

The height it should be lifted is 5m.