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Worksheets[Reviewer] T3 WW2: Work, Power and Energy
Total questions: 16
Worksheet time: 7mins
Match the following quantites with their correct formula
Power (P)
F · d · cosθ
Kinetic Energy
W/t
Gravitational Potential Energy
m · g · h
Work (W)
½ m · v²
Total Mechanical Energy
KE + PE
What is/are the unit/s for work?
Watt (W)
Newton (N)
Joule (J)
Newton · meter (N·m)
When is work considered to be done on an object?
When force is applied but the object does not move.
When force is applied and the object moves in the direction of the force.
When force is applied in any direction.
When an object moves without any force.
Which of the following situations shows work being done?
Holding a book without moving.
Pushing a car that does not move.
Lifting a box onto a shelf.
Standing still while carrying a heavy backpack.
A ball is thrown upwards. What happens to its KE and PE as the ball goes up?
KE increases and PE decreases
KE decreases and PE increases
Both KE and PE increases
Both KE and PE decreases
Which of the following examples illustrates NO WORK being done? Select all correct answers.
A person lifting a weight above their head.
A person climbing stairs with a backpack.
A person pushing a wall without moving it.
A person walking while holding a suitcase.
In which scenario is work done against gravity?
Sliding a book across a table.
Standing still with a suitcase.
Carrying a bag horizontally.
Climbing a ladder with a bucket of water.
Which of the following describes power?
The rate at which work is done.
The amount of force applied to an object.
The amount of energy stored in an object.
The speed at which an object moves.
Which of these activities requires the most power?
Lifting a box slowly
Lifting a box quickly
Holding a box without moving
Placing a box gently on the floor
Which of the following increases power output?
Decreasing work and increasing time
Increasing work and decreasing time
Keeping work constant while increasing time
Doing less work over a longer time
What happens to power when the same amount of work is done in half the time?
It doubles
It stays the same
It is cut in half
It reduces to zero
An object’s kinetic energy depends on which two factors?
Mass and height
Mass and velocity
Force and time
Power and acceleration
Which of the following is an example of gravitational potential energy?
A moving car
A stretched rubber band
A book placed on a high shelf
A spinning wind turbine
What is potential energy?
Energy of an object due to its motion
Energy stored in an object due to its position
Energy transferred through heat
Energy used to do work
Which of the following is the correct definition of mechanical energy?
The total amount of energy in an object, including chemical and thermal energy
The sum of an object's kinetic and potential energy
The energy stored in chemical bonds
The energy lost due to friction
A roller coaster car is moving along a frictionless track. The (a) remains constant throughout its motion. All (b) at the maximum height will convert into (c) just before the car hits the lowest point of the track.
