P1-Conservation and dissipation of energy Flashcards
1
Q
what ways can energy be stored
A
chemical energy stores E.g. batteries Kinetic energy stores GPE Stores Elastic Potential energy stores thermal energy stores
2
Q
How is energy transferred
A
transferred by heating
3
Q
how can energy be stored
A
energy can not be created or destroyed
>when a rubber band is stretched
>when a object is lifted
4
Q
what is the equation for work done
A
work done (J)= force applied (N) X distance
5
Q
what is the equation for gravitational potential energy
A
mass (kg) X gravitational potential field strength (N/kg) X Change of height (M)
6
Q
Kinetic energy
A
1/2 X mass (Kg) X speed² (m²)
7
Q
Energy Dissipation
A
wasted energy
8
Q
how to calculate efficiency
A
useful energy output
____________________
use full energy input
9
Q
weight
A
weight = mass x gravity field strength
