Question

The mass of a ball that has 375J of potential energy at 15 m high

Answer 1

The gravitational potential energy of an object is given by

`U=mg \Delta h`
where m is the mass of the object, g the gravitational acceleration, and
`\Delta h` is the height of the object with respect to a reference point.

In our problem, the potential energy is U=375 J and the altitude of the object is
`\Delta h=15 m`, so by re-arranging the equation we can find the mass of the ball:

`m= (U)/(g \Delta h) = (375 J)/((9.81 m/s^2)(15 m))=2.5 kg`