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

Change in potential energy is 700.7 J.

Explanation:

Given:

Mass of the object is, kg

Height to which the object is raised above his head, m

Acceleration due to gravity is, m/s²

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

, where,

Now, plug in the given values and solve.

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

snell's law

refractve index = sin incidence / sin refraction