In order for work to happen a force must be applied and:

The object must move in the same direction as the force.

The object must move in the opposite direction as the force.

The force must be less that the object being moved.

The direction has no bearing on the force.

When a box is moved up a ramp into a truck, the amount of work done depends on:

The distance the box is from the ground to the truck.

The distance from the end of the ramp to the truck.

Which of the following is true about work ?

It measures how much effort is applied over a distance.

It measures how quickly an object accelerates

It measures the change of an object's rate of speed.

It measures how much time it takes to move an object.

In which of these cases is work being done?

A student carries his chair into another room.

A student pushes a locked door that does not move.

Which of the following is a true statement about work?

It measures how much effort is applied over a certain distance

It measures how quickly an object accelerates

It measures the change in an object's rate of speed

It measures how much time it takes to move a massive object

Simple machines make work easier by increasing what?

The distance over which work is done

The acceleration of a massive object

Which of the following would produce the most power?

A mass of 10 kilograms lifted 10 meters in 5 seconds

A mass of 10 kilograms lifted 10 meters in 10 seconds

A mass of 5 kilograms lifted 10 meters in 5 seconds

A mass of 5 kilograms lifted 5 meters in 10 seconds

Which of the following does a simple machine do?

allows the users to apply less force over a longer distance

reduce the amount of force needed to do work

change the direction of the applied force

How does a pulley make work easier?

It changes direction and increases the effect of your input force

It changes the direction of the input force.

It changes the distance over which the input force is applied.

It changes the amount of the input force applied

How can simple machines make work easier?

by decreasing the force needed to complete the task

by increasing the friction between the machine and the object

by adding more work on the object than originally applied

by removing the force of gravity on the object

Simple machines can make work easier by reducing the input force needed to move an object. However, there is a trade off for decreased input. What is the trade off?

The distance the object is moved is increased.

The distance the object is moved is decreased.

The amount of work is increased.

The amount of work is decreased.

Work and Simple Machines Review

Authored by Caroline Bragg

Physics

8th Grade

NGSS covered

Used 3+ times

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the scientific definition of work?

Thinking hard about something.

Using force to move an object.

Making money.

Listening to music.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True or False: As a man pushes a refrigerator up a ramp, work is done.

True

False

Tags

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

True or False: A man would do more work if he pushes a box up a ramp faster.

True

False

Tags

NGSS.MS-PS3-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A girl LIFTS a bag.

Work

No Work

Tags

NGSS.HS-PS2-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A boy HOLDS a book.

Work

No Work

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A man SITS on a box

Work

No Work

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A woman WAITS for her dog to urinate.

Work

No Work

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Work and Simple Machines Review

What is the scientific definition of work?

True or False: As a man pushes a refrigerator up a ramp, work is done.

True or False: A man would do more work if he pushes a box up a ramp faster.

A girl LIFTS a bag.

A boy HOLDS a book.

A man SITS on a box

A woman WAITS for her dog to urinate.

A boy KICKS a soccer ball.

A girl SWIMS.

A student SPRINTS across the field.

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