Question

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

• A. $150m$
• B. $100m$
• C. $50m$
• D. $200cm$

Answer 1

The correct option is C

$50m$

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, $h=50m$