Conservation of Energy (Chapter 1) Flashcards
1
Q
what is the equation for work done
A
work done = force x distance moved
2
Q
what is forced measure in?
A
newtons
3
Q
what is distance measure in?
A
meters
4
Q
what is work done measure in?
A
joules
5
Q
weight =
A
mass x gravitational field strength
6
Q
change in objects gravitational potential energy store =
A
weight x height
7
Q
energy transferred =
A
work done
8
Q
velocity=
A
square root 2ke/m
9
Q
mass =
A
2ke divided by velocity squared
10
Q
kinetic energy =
A
1/2 x mass x velocity squared
11
Q
velocity is measured in
A
m/s
12
Q
gravitational potential energy=
A
mass x gravitational field strength x height
13
Q
what is useful energy mean?
A
the energy transferred to how we want it
14
Q
what is wasted energy mean?
A
the energy is not usefully transferred
15
Q
efficiency =
A
useful output energy
——————————– x100
total amount of energy
input to the device
