Match units to uses
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Kilowatt hours (kWh) | arrow_right_alt | Standard unit of energy |
Joules (J) | arrow_right_alt | How energy in food is measured |
Watts | arrow_right_alt | How energy used by a home is measured |
Kilojoules (kJ) | arrow_right_alt | Standard unit of power |
Categorise the items into most appropriate
Wood used for a campfire
Coal used in a factory
Diesel in a generator
Petrol used in a car
Paper straw used for a drink
A kitchen fork used for dinner
A mug used for coffee
School shirt worn today
Water going through a dam
Reusable
Renewable
Non-renewable
Yesterday in lesson we learnt how to calculate gravitational energy.
E = m x g x h
E is energy
m is mass
g is gravity
h is height
What is the unit of energy?
What is the unit of mass?
Peter holds a ramp 1 meter high. Gravity is 9.8. The mass of the car at the top of the ramp is 1 kilogram. How much energy does the car have?
Peter lets go of the car. At the bottom of the ramp it is moving. How much kinetic energy does it now have compared to the top of the ramp?
Ben holds the ramp up at 0.5 meters. Gravity is 9.8. The car has a mass of 1 kg. What is the gravitational energy of the car?
Which car will have more kinetic energy at the bottom of the ramp?
Ollie has watched both cars and says that Ben's car is slower. Explain why Ollie is correct using our keywords.