Energy

Question 1

Work done equation

Answer 1

W=Fxs
W=work done (joules)
F=force(newtons)
S=distance(meters)

Question 2

GPE equation

Answer 2

MxGXH
M=Mass(kg)
G=gravity (9.81)
H= change in height(meters)
GPE= gravitational potential energy

Question 3

KE equation

Answer 3

2
Ke=0.5xMxV
Mass(kg)
Velocity(m/s)

Question 4

Power equation

Answer 4

P=w/t
W=watts(joules)
T=time (secs

Question 5

Specific heat capacity equation

Answer 5

E=MxCx§0
E=energy
M=mass(kg)
C=specific heat capacity(j/kg°c)
Change in heat (°c)

Question 6

What is the conservation of energy

Answer 6

Energy cannot be created or destroyed but only transferred from one energy store to another

Question 7

What are the 4 energy pathways

Answer 7

Mechanical- when a force is involved
Electrical- when electricity is involved
Heating- when there is a change in temperature
Radiation- by light or other electromagnetic waves

Question 8

What are the 8 energy stores

Answer 8

Kinetic- moving objects
Chemical- inside chemical bonds
Thermal- hot objects
GPE- lifting something up
Magnetic- between 2 magnets. Nuclear- nuclear reaction
Electrostatic- between 3 charges. Elastic- stretched objects