WorksheetsUnderstanding Energy Concepts
Total questions: 12
Worksheet time: 6mins
What is the formula for calculating work?
Work = Force × Distance × cos(θ)
Work = Mass × Acceleration
Work = Energy × Time
Work = Force + Distance
Define kinetic energy and provide an example.
Kinetic energy is the energy stored in an object at rest; for example, a stationary boulder.
Kinetic energy is the energy of an object due to its temperature; for example, a hot cup of coffee.
Kinetic energy is the energy of an object in motion; for example, a moving car.
Kinetic energy is the energy released during a chemical reaction; for example, burning wood.
What is the unit of power?
ohm
joule
watt
volt
How is potential energy different from kinetic energy?
Potential energy is the energy of sound waves.
Kinetic energy is stored energy based on position.
Potential energy is stored energy based on position; kinetic energy is energy of motion.
Potential energy is always greater than kinetic energy.
State the Law of Conservation of Energy.
Energy can be created and destroyed.
Energy cannot be created or destroyed, only transformed.
Energy is always lost in transformations.
Energy can only be created from matter.
If a force of 10 N moves an object 5 m, how much work is done?
25 J
50 J
40 J
75 J
What is the relationship between work and energy?
Work is a form of energy storage.
Work is the same as energy.
Energy can exist without work.
Work is the transfer of energy.
Calculate the power if 100 J of work is done in 5 seconds.
15 W
50 W
20 W
25 W
Explain how energy can change forms with an example.
A battery stores kinetic energy for later use.
An example of energy changing forms is a roller coaster, where potential energy at the top converts to kinetic energy as it descends.
A car engine transforms thermal energy into chemical energy.
A light bulb converts electrical energy into sound energy.
What happens to energy in a closed system according to the Law of Conservation?
Energy can be freely exchanged with the environment in a closed system.
Energy is created and destroyed in a closed system.
Energy is conserved and can only change forms in a closed system.
Energy can only be lost in a closed system.
If a machine has a power output of 200 W, how much work can it do in 10 seconds?
2500 J
2000 J
1000 J
1500 J
Describe a real-life scenario where work is done.
A person pushing a shopping cart.
A person watching TV.
A person sitting on a bench.
A person reading a book.
