Kinetic Energy - Energy Flashcards
1
Q
What 2 factors affect kinetic energy and how?
A
- Speed - the faster, the more kinetic energy
- Mass - more mass, the more kinetic energy
2
Q
What is the equation for kinetic energy?
State the units
A
Eₖ = ½MV²
Eₖ = Energy (Kinetic) - Joules
M = Mass - kg
V = Velocity (Speed) - m/s
3
Q
What happens when something falls?
A
Energy from its gravitational potential energy store is transferred to its kinetic energy store.
4
Q
What is the rule for a falling object when there is no air resistance?
A
Energy lost from the g.p.e store = Energy gained in the kinetic energy store
5
Q
What is the limit of proportionalitity?
A
Elastic - When the force applied and extension are no longer proportional , this means that you can’t get the spring to go back to its original shape
