Question

To what height should an object of mass $\text{2 kg}$ be raised so that its potential energy is $\text{980 J}$?

Take $g=9.8m/s^2$

• A. 50 cm
• B. 100 m
• C. 50 m
• D. 100 cm

Answer 1

The correct option is C

50 m

Potential energy is mathematically represented as $\text{P.E. = m}\times g\times h$ ,
where m is the mass,
g is the gravitational acceleration and
h is the height from the ground.

On substituting the values, we get:
$980=2\times 9.8\times h$
$\text{h = 50 m}$