Work Done, Energy And Power Flashcards
1
Q
Forces do work.
What is the easiest equations for work done?
A
WD=F x distance
2
Q
Define energy
A
Energy is the ability a body has to do work
3
Q
What is the equation for Kinetic energy?
A
Ke = 1/2mv^2
4
Q
What is gravitational energy’s equations?
A
Ep =mgh
5
Q
Define a joule
A
One joule is the the work done by a force of one newton over a distance of one meter
6
Q
What is the definition of power?
A
Energy transferred per unit time
7
Q
Name two equations for mechanical power
A
P=Fv
P=E/t
8
Q
What is the equation for the percentage efficiency of and energy transfer?
A
(Useful energy out)/total energy in) x 100
