Question

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

• 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 acceleration due to gravity and h is the height from the ground.

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