Page 61 - Science Course 2 (Book 2)

Mo9-L3a: What are Kinetic and Potential Energy?

Kinetic energy depends on mass. Gravitational potential energy depends on the mass
Kinetic energy also depends on speed. of an object and its distance from Earth’s surface.

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E = mv² The more mass an object has and the greater its
k 2 distance from Earth, the greater its gravitational
E = kinetic energy of object potential energy.
k
m = mass of object
v = speed of object

If the turbine blades were smaller and had less
mass, they would have less kinetic energy.
When the wind blows harder, the blades move faster
and have more kinetic energy.

This ball has kinetic energy due
to its motion. Amount of kinetic Hydroelectric energy plants convert the gravitational
energy it has depends on its potential energy of water into electric energy.
speed and its mass

Potential energy is stored energy that depends on
the interaction of objects, particles, or atoms.

Gravitational potential energy is a type of potential
energy stored in an object due to its height above
Earth’s surface.

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