Question

If a weightlifter lifts a 286 kg mass 0.25 meters above his head, how much PEg does the mass have?

Answer 1

Answer:

Answer on edge is 700

Explanation:

Answer 2

Answer:

Change in potential energy is 700.7 J.

Explanation:

Given:

Mass of the object is, $m=286$ kg

Height to which the object is raised above his head, $h=0.25$ m

Acceleration due to gravity is, $g=9.8$ m/s²

We know that for a mass $m$ raised to a height $h$, the change in potential energy is given as:

$\Delta PE=mgh$, where, $\Delta PE\rightarrow \textrm{Change in Potential Energy}$

Now, plug in the given values and solve.

$\Delta PE=286\times 9.8\times 0.25=700.7\textrm{ J}$

Therefore, the change in the potential energy is 700.7 J.