Question

A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)3.9 m4.0 m39.2 m40.0 m

Answer 1

Answer:b

Step-by-step explanation:

Answer 2

Given:

The mass of the dog is,

`m=40\text{ kg}`

The potential energy is,

`PE=1568\text{ J}`

To Find:

The height of the hillside

Step-by-step explanation:

We know, the potential energy at a height (h), is,

`PE=mgh`

Here, the acceleration due to gravity is,

`g=9.8\text{ m/s}^2`

Substituting the values we get,

`\begin{gathered} 1568=40*9.8* h \\ h=(1568)/(40*9.8) \\ h=(39.2)/(9.8) \\ h=4.0\text{ m} \end{gathered}`

Hence, the height of the hilltop is 4.0 m.