work, energy, power 🍑 Flashcards
1
Q
what is work done?
A
force multiplied by distance moved in the direction of the force (1J = 1N x 1m)
2
Q
what is energy?
A
energy is the ability to do work
i no energy
3
Q
what is gravitational potential energy?
A
energy stored in an object as a result of its vertical height (GPE = mgh)
4
Q
kinetic energy formula
A
KE = 1/2 mv²
5
Q
principle of conservation of energy:
A
energy cannot be created or destroyed but it can be converted from one form to another. the total energy in a closed system is constant
6
Q
efficiency formula
A
useful energy output / total energy output x 100%
7
Q
power formula
A
work done / time OR energy / time
