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WorksheetsUnderstanding Work, Energy, and Power
Total questions: 15
Worksheet time: 8mins
What is the formula for kinetic energy?
KE = 0.5 * m * v^2
KE = m * v
KE = 0.5 * m * v
KE = m * v^2 / 2
How does potential energy differ from kinetic energy?
Potential energy is energy from heat; kinetic energy is energy from gravity.
Potential energy is energy of motion; kinetic energy is energy from rest.
Potential energy is stored energy based on position; kinetic energy is energy of motion.
Potential energy is energy of motion; kinetic energy is stored energy based on position.
If a force of 10 N moves an object 5 m, how much work is done?
100 J
50 J
25 J
75 J
What is the unit of power in the International System of Units?
volt
watt
joule
ohm
Explain the principle of conservation of energy.
Total energy can vary in an open system.
Energy is only lost and never gained in processes.
Energy cannot be created or destroyed, only transformed; total energy in a closed system remains constant.
Energy can be created and destroyed in a system.
Calculate the kinetic energy of a 2 kg object moving at 3 m/s.
15 Joules
9 Joules
6 Joules
12 Joules
What factors affect gravitational potential energy?
Time, speed, and acceleration.
Temperature, pressure, and volume.
Velocity, distance, and mass density.
Mass, height, and gravitational field strength.
Define work done in the context of physics.
Work done is the sum of energy and time taken.
Work done is the difference between potential and kinetic energy.
Work done is the product of force and distance in the direction of the force.
Work done is the total mass multiplied by speed.
How is power calculated in terms of work and time?
Power = Work + Time
Power = Work - Time
Power = Time / Work
Power = Work / Time
What is the relationship between work and energy?
Energy is the measure of work done.
Work is the transfer of energy.
Work is the creation of energy.
Work and energy are unrelated concepts.
Describe a real-life example of energy conservation.
Using high-energy appliances for daily tasks.
Using energy-efficient LED light bulbs instead of incandescent bulbs.
Leaving lights on in unoccupied rooms.
Using traditional incandescent bulbs for lighting.
If a machine does 200 J of work in 10 seconds, what is its power output?
30 W
15 W
20 W
25 W
What happens to the total mechanical energy in a closed system?
The total mechanical energy remains constant.
The total mechanical energy decreases continuously.
The total mechanical energy fluctuates randomly.
The total mechanical energy increases over time.
How does height affect potential energy?
Height only affects kinetic energy, not potential energy.
Potential energy decreases with increased height.
Height has no effect on potential energy.
Height directly affects potential energy; higher height results in greater potential energy.
What is the work-energy theorem?
The work-energy theorem states that energy cannot be created or destroyed.
The work-energy theorem defines the relationship between force and mass.
The work-energy theorem explains how potential energy is converted to thermal energy.
The work-energy theorem relates the work done on an object to its change in kinetic energy.
