How does using a ramp make work easier when loading a piano onto a truck three feet above the ground?

It allows a smaller force to be applied over a longer distance.

It allows a larger force to be applied over a shorter distance.

It allows a larger force to be applied over a longer distance.

It allows a smaller force to be applied over a shorter distance.

Which statement describes how a machine can help make work easier?

It can put out more force than the input force by decreasing the distance over which force is applied.

It can increase the amount of work performed if the output force is in the same direction as the input force.

It can apply a greater output force over a greater distance compared to the input force and distance.

It can increase the distance over which output force acts by applying less output force than input force.

What is needed for work to be done?

A force must cause an object to move along the same direction as the force.

A force must push on an object without moving it.

A force must pull on an object without moving it.

A force must act on an object while an equal force acts oppositely on the object.

Adita lifts a book from the floor, carries it across the room, and places it on a high shelf. When is Adita doing work on the book?

She does work as she picks up the book and as she lifts it to the shelf.

She does work on the book at no time during this process.

She does work only while she carries the book across the room.

She does work from the moment she touches the book until she lets it go.

Work and Energy Review

Authored by Kelley Folmar

Physics

6th - 8th Grade

NGSS covered

Used 36+ times

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23 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the source of almost all energy on Earth?

Earth’s hot core

the Sun

stored carbon

moving water

Tags

NGSS.HS-ESS1-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When a person strikes and lights a match, potential energy in the match is transformed into which types of energy?

electrical and thermal

thermal and radiant

radiant and nuclear

nuclear and kinetic

Tags

NGSS.MS-PS3-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What energy transformation takes place when energy from the wind is used to spin a turbine?

nuclear energy transformed to electrical energy

chemical energy transformed to electrical energy

radiant energy transformed to mechanical energy

kinetic energy transformed to mechanical energy

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

It is increased.

It is conserved.

It is decreased.

It is created.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS1-4

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

position, gravity

gravity, velocity

velocity, height

height, position

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

the volume and height the ball reaches

the volume and shape of the ball

acceleration due to gravity and the height the ball reaches

acceleration due to gravity and the shape of the ball

Tags

NGSS.MS-PS3-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

Total energy increases.

Stored energy decreases.

Energy of motion decreases.

Total energy decreases.

Tags

NGSS.MS-PS3-5

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Work and Energy Review

What is the source of almost all energy on Earth?

When a person strikes and lights a match, potential energy in the match is transformed into which types of energy?

What energy transformation takes place when energy from the wind is used to spin a turbine?

As a person pushes a box across a floor, the energy from the person’s moving arm is transferred to the box, and the box and the floor become warm. During this process, what happens to energy?

Which set of terms best defines what affects kinetic energy and potential energy, respectively?

Seema knows the mass of a basketball. What other information is needed to find the ball’s potential energy?

If the kinetic and potential energy in a system are equal, then the potential energy increases. What happens as a result?

Which is occurring when work is being done?

What is the unit of measure for energy?

When a spring is compressed, the energy changes from kinetic to potential. Which best describes what is causing this change?

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