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Worksheets3rd Year Energy Revision
Total questions: 22
Worksheet time: 18mins
The energy in which store increases as a car moves faster?
Gravitational Potential Energy
Kinetic Energy
Thermal Energy
Elastic Potential Energy
The energy in which store decreases as a candle burns?
Chemical energy store
Kinetic energy store
Nuclear energy store
Food, fuels and batteries have energy in this energy store
Chemical
Thermal
Gravitational Potential
Elastic
A stretched rubber band has energy in this energy store
Magnetic
Electrostatic
Elastic
Nuclear
What is the unit of energy?
Watt (W)
Newton (N)
Joule (J)
Kilogram (kg
Identify the energy transfer
chemical to kinetic
solar to electrical
thermal to light
electrical to light
A washing machine uses 250J of electrical energy to produce 125J of useful energy. How efficient is it?
5%
50%
55%
100%
An iPhone charger coverts 75J of electricty in to 50J of charge and 25J of thermal energy. How efficient is the charger?
10%
100%
33%
67%
what is the law of conservation of energy
energy can be created but cannot be destroyed
energy cannot be created or destroyed, but it can be transformed
energy can be destroyed but not created
energy cannot be created destroyed or transformed
A kettle uses 100J of electrical energy to produce 7J of sound energy and 93J of thermal energy. How efficient is the kettle?
100%
7%
93%
95%
Calculate the efficiency of a toy car which was supplied with 80000 J of input energy and generated two different forms of energy, including 12800 J of thermal energy.
(a)
Calculate the efficiency of a light bulb which was supplied with 3000 J of input energy and generated two different forms of energy, including 2040 J of thermal energy.
(a)
Resolution is...
The smallest division that can be measured in an experiment
How easily you see things
How accurate an answer is
What is the kinetic energy of a 1,600kg Mustang travelling at 15 m/s (33mph)
180000 J
294 J
1225 J
3920000 J
A 2kg television falls from 1 meter. How much energy does it have?
19.6 J
196 J
2 J
9.8J
