Pendulum Flashcards
1
Q
Energy rule
A
Energy can be transferred usefully stored or dissipated but it can’t be created or destroyed
2
Q
What is a system
A
A system is an object or a group of objects
3
Q
What happens in a closed system
A
No energy can enter or leave it
4
Q
What happens as the pendulum swings
A
Friction passes through the air
5
Q
What does friction cause
A
Energy to transferred to thermal energy stores
6
Q
What happened to the fixed air around the pendulum swings
A
Air gradually gets warmer
7
Q
These stores of energy of thermal energy are…
A
Less useful
The energy is dissipated (wasted)
8
Q
What happens when energy is dissipated of pendulum
A
Causes pendulum to gradually swing with less energy and eventually stop
9
Q
How do can you reduce unwanted energy transfer
A
Reducing friction
10
Q
Ways to reduce friction
A
- use lubricant
- remove the air particles from around the pendulum
