Question

A soap box derby car at the top of a ramp has _________ energy and at the finish line at the bottom of the ramp it has _________ energy.

Answer 1

the answer is B) potential, kinetic
potential energy is energy of position (here gravity)
potential energy is energy of motion

Answer 2

Energy can be classified into two categories:

Kinetic energy which is the energy possessed by a body in motion. It is expressed mathematically as:

`KE = (mv^(2) )/(2)`

where m = mass of object and v = velocity

Potential energy which is the energy content of a body relative to its position. It can be expressed as:

`PE = mgh`

where m = mass, g = acceleration due to gravity, h = height

The two forms of energy can be interconverted. In the given example:

A soap box derby car at the top of a ramp has potential energy and at the finish line at the bottom of the ramp it has kinetic energy.