Units for energy
Joules
Moving objects have this energy
Kinetic Energy
What is the force that opposes kinetic energy?
Friction
What is GPE?
Gravitational Potential Energy
Ball rolling down a hill
Gravitational Potential Energy
Kinetic Energy
Thermal Energy (Friction)
How many J in kJ
1000 J
Hot objects contain this energy
Thermal Energy
What type of energy is friction?
Thermal Energy
Formula for GPE
GPE = mgh
Arrow shot from a bow
Elastic Potential Energy
Kinetic Energy
Thermal Energy (Friction)
How many J in MJ?
1000000 J
A form of wave energy that can travel through space
Light Energy
Formula for kinetic energy
1/2mv2
Value of gravity
9.81 m/s2
Strumming a guitar
Elastic Potential Energy
Kinetic Energy
Thermal Energy (Friction)
Sound Energy
How many J in 0.002 kJ?
20 J
Energy carried by a wave travelling on or through a substance
Sound Energy
What is the kinetic energy of a 1000kg car moving at 5m/s
12500 J
What type of force is gravity?
Acceleration Force
Olympic sprinter
Chemical Potential Energy
Kinetic Energy
Thermal Energy (Friction)
3x105 in J
300000 J
Spinning objects have this energy
Which runner has more kinetic energy?
Person A: 45kg, 5m/s
Person B: 75kg, 3m/s
They have the same
What is the GPE if a 10kg rock falls from 2 meters?
196.2 J
Turning on and driving a car
Chemical Potential Energy
Electrical Energy
Kinetic Energy
Thermal Energy
Sound Energy