P2 Work, Energy and Power Flashcards
1
Q
What type of energy is stored in a moving object?
A
Kinetic energy.
2
Q
What happens, in terms of energy, when an object is
lifted?
A
Its gravitational potential energy
increases.
3
Q
Give an equation for kinetic energy
A
½mv²
4
Q
Give an equation for gravitational
potential energy
A
mgh
5
Q
When work is done against friction or
resistance, what happens?
A
There is less of a change in kinetic
energy because some energy is
dissipated through heating.
6
Q
What is the original source of most of the
energy on Earth?
A
The sun
7
Q
What forms of energy do not ultimately
come from the sun?
A
Geothermal
● Nuclear
● Tidal
8
Q
What is the source of the sun’s energy?
A
Nuclear fusion.
