The main sources of energy on Earth are

potential energy and kinetic energy

When is work done on an object?

Work is done when a net force acts on an object

the object moves in the direction of the net force.

when energy is being transferred from one place to another or transformed from one form to another

We observe the effects of energy when something is happening

the rate (time interval) at which work is done.

If a forklift is replaced with a new forklift that has twice the power, how much greater a load can it lift in the same amount of time? If it lifts the same load, how much faster can it operate?

The forklift that delivers twice the power will lift twice the load in the same time, or the same load in half the time.

it doesn't, it operates at the same speed

How can you calculate power?

Power equals the amount of work done divided by the time interval during which the work is done.

power equals the amount of work done multiplied by the time interval during which the work is done

What are the two forms of mechanical energy?

kinetic energy and potential energy.

gravitational energy and thermal energy

chemical energy and biological energy

the energy due to the position of something or the movement of something.

The property of an object or system that enables it to do work

the rate at which work is done.

Some work is done to change the speed of an object.

Name three examples of potential energy.

elastic potential energy, chemical energy, and gravitational potential energy.

mechanical, fossil fuels, and thermal energy

the force, the pacific ocean, and the hulk

How are work and the kinetic energy of a moving object related?

The kinetic energy of a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

Energy that is stored and held in readiness

It can be transformed from one form into another, but the total amount of energy never changes

transfers energy from one place to another or transforms it from one form to another.

What does the law of conservation of energy state?

energy cannot be created or destroyed. It can be transformed from one form into another, but the total amount of energy never changes.

a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

the energy due to the position of something or the movement of something.

the rate (time interval) at which work is done

How does a machine use energy?

transfers energy from one place to another or transforms it from one form to another

is the ratio of useful energy output to total energy input

some energy is transformed into atomic or molecular kinetic energy

a moving object is equal to the work required to bring it to its speed from rest, or the work the object can do while being brought to rest.

What is the work-energy theorem?

states that whenever work is done, energy changes.

states that energy is created, work is done

says that work and energy are the same

requires work to be created in order for energy to be changed.

Why can’t a machine be 100% efficient?

Because wasted energy is dissipated as heat.

a small fraction of input energy is converted into thermal energy.

efficiency is about making heat

due to inventors not being smarter

Energy Multiple Choice Test

Physics

8th - 12th Grade

NGSS covered

Used 133+ times

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This quiz comprehensively covers fundamental concepts in work, energy, and power, making it most appropriate for high school physics students at the 9th-12th grade level. The questions assess students' understanding of mechanical energy forms (kinetic and potential energy), the relationship between work and energy, power calculations, energy conservation principles, and machine efficiency. Students need to master the mathematical relationships between force, distance, and work (W = Fd), understand that kinetic energy depends on mass and velocity squared (KE = ½mv²), and apply the work-energy theorem to solve practical problems involving moving objects. The quiz requires students to analyze energy transformations, calculate efficiency percentages, and understand how simple machines like pulleys operate under ideal conditions. Students must also grasp broader energy concepts including conservation of energy and recognize the sun as Earth's primary energy source. This quiz was created by a classroom teacher who designed it for students studying physics energy concepts in grades 8-12. This assessment serves multiple instructional purposes, functioning effectively as a comprehensive unit review, formative assessment tool, or homework assignment to reinforce energy principles covered in class. Teachers can use this quiz as a diagnostic tool before major assessments to identify areas where students need additional practice, or deploy it as a warm-up activity to activate prior knowledge about energy transformations. The varied question formats, from conceptual understanding to mathematical applications, make it ideal for differentiated instruction and provide students with multiple opportunities to demonstrate their mastery of energy concepts. This quiz aligns with Next Generation Science Standards MS-PS3-2 and HS-PS3-1, which focus on developing models to describe energy storage and transfer in physical systems.

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28 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Raising an auto in a service station requires work. Raising it twice as high requires

half as much work

the same work

twice the work

four times the work

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-2

NGSS.MS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Raising an auto in a service station requires work. Raising it in half the time requires

half the power

the same power.

twice the power

four times the power

Tags

NGSS.HS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The energy due to the position of something or the energy due to motion is called

potential energy

kinetic energy

mechanical energy

conservation of energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS3-4

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After you place a book on a high shelf, we say the book has increased

elastic potential energy.

chemical energy

kinetic energy.

gravitational potential energy

Tags

NGSS.MS-PS3-2

NGSS.MS-PS2-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An empty truck traveling at 10 km/h has kinetic energy. How much kinetic energy does it have when it is loaded so its mass is twice, and its speed is increased to twice?

the same KE

twice the KE

four times the KE

more than four times the KE

Tags

NGSS.HS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following equations is most useful for solving a problem that asks for the distance a fast-moving crate slides across a factory floor in coming to a stop?

F = ma

Ft = ∆mv

KE = 1/2mv2

a. Fd = ∆1/2mv2

Tags

NGSS.HS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A boulder at the top of a vertical cliff has a potential energy of 100 MJ relative to the ground below. It rolls off the cliff. When it is halfway to the ground its kinetic energy is

the same as its potential energy at that point

negligible

about 60 MJ

more than 60 MJ

Tags

NGSS.HS-PS3-2

NGSS.HS-PS3-1

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Energy Multiple Choice Test

Raising an auto in a service station requires work. Raising it twice as high requires

Raising an auto in a service station requires work. Raising it in half the time requires

The energy due to the position of something or the energy due to motion is called

After you place a book on a high shelf, we say the book has increased

An empty truck traveling at 10 km/h has kinetic energy. How much kinetic energy does it have when it is loaded so its mass is twice, and its speed is increased to twice?

Which of the following equations is most useful for solving a problem that asks for the distance a fast-moving crate slides across a factory floor in coming to a stop?

A boulder at the top of a vertical cliff has a potential energy of 100 MJ relative to the ground below. It rolls off the cliff. When it is halfway to the ground its kinetic energy is

In an ideal pulley system, a woman lifts a 100-N crate by pulling a rope downward with a force of 25 N. For every 1-meter length of rope she pulls downward, the crate rises

When 100 J are put into a device that puts out 40 J, the efficiency of the device is

An energy supply is needed for the operation of a(n)

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