Question

Energy Problems

19. If your object has a mass of 3kg and you hold it 3.5m above the Earth's surface, what is the
objects potential energy?
a. 10.5 J
b. 102.9)
c. 1.07]
d. 31.5)​

Answer 1

b. Potential energy is 102.9 J

Step-by-step explanation:

Given:

Mass of the object is,
`m=3\textrm{ kg}`

Height of the object above ground,
`h=3.5\textrm{ m}`

Acceleration due to gravity,
`g=9.8` m/s²

Potential energy of an object at a height above the ground is given as:

`PE=mgh`

Plug in 3 for
`m`, 9.8 for
`g`, and 3.5 for
`h`. Solve for potential energy
`PE`.

`PE=3* 9.8* 3.5=102.9\textrm{ J}`

Therefore, the potential energy of the object is 102.9 J.