Match each word with the best description.

a rubbing of one thing against another

Match each word with the best description.

the force that makes objects move toward the center of the earth.

Match each word with the best description.

the force that makes objects move toward the center of the earth.

Match each word with the best description.

a device for applying power

Match each word with the best description.

a force moving an object

Complete the sentence.

Gravity makes it ...................... to move things uphill.

What are you doing when you open a car door?

Complete the sentence.

When you ride downhill on a bike, you are working ...................... gravity.

What force is present when two things rub against each other?

On which type of surface is the force of friction less?

Which examples show friction? Select all that apply. 

Imagine you are roller skating. If you move forward, which direction is friction moving?

Match these vocabulary words with their definition.

the ability to do work

Match these vocabulary words with their definition.

energy that is being used to move something

Match these vocabulary words with their definition.

energy at rest

What is energy used as a force to do? 

Which of the following describes potential energy?

Which of the following describes kinetic energy?

Select if the statement is true or false.

Pushing or pulling requires no energy.

Complete the sentence.

When gravity makes an object fall toward the ground, the object has ...............energy.

What can people do? 

What does this picture show?

What does this picture show? 

Select if the statement is true or false.

Speed is a way to measure how fast a force makes an object travel.

Select if the statement is true or false.

Work is done when a force moves something.

Select if the statement is true or false.

Potential energy is energy being used to move something.

Which is the natural force that causes objects to move toward the center of the earth?

Which of the following best describes potential energy?

What makes work easier? 

All lifting work is done against a pull. What is that pull? 

An ice skater is moving left. In which direction is friction working? 

Complete the sentence.

.................... is the measurement of distance moved over time.

What is the push or pull needed to do work called? 

A book falling toward the floor is an example of which of the following? 

Select if the statement is true or false.

An object in motion will stay in motion unless stopped by a force.

Select if the statement is true or false.

Energy means a pull toward the center of the earth.

Match each word with the best description.

pull toward the center of the earth

Match each word with the best description.

push or pull

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makes things stop

Match each word with the best description.

boy ice skating

Match each word with the best description.

boy sleeping

what is a lever?

Select if the statement is true or false.

Not all levers have a load.

What are three parts of a lever?

hammer

pulley

screw

The letter A is oar controlled by the person, letter B is the oar moving through the water, and letter C is the connection of the boat to the oar. Identify the parts of the lever from the example.

A is ...........

The letter A is oar controlled by the person, letter B is the oar moving through the water, and letter C is the connection of the boat to the oar. Identify the parts of the lever from the example.

B is ............

The letter A is oar controlled by the person, letter B is the oar moving through the water, and letter C is the connection of the boat to the oar. Identify the parts of the lever from the example.

C is ..................

Letter A represents the piggy bank, letter B represents the forearm, and letter C represents the elbow. Label the parts of the lever.

A is .................................

Letter A represents the piggy bank, letter B represents the forearm, and letter C represents the elbow. Label the parts of the lever.

B is .....................

Letter A represents the piggy bank, letter B represents the forearm, and letter C represents the elbow. Label the parts of the lever.

C is ......................

Complete the sentence.
 

A lever with a fulcrum close to the load will ...................... a lever with a fulcrum far away from the load.

Which of the following is not an inclined plane?

Which is easiest?

Which simple machine is a person using when he or she pushes a box up a ramp?

Complete the sentence.

Inclined planes .................... the distance you have to move a load.

What do you use the wedge to do? 

A wedge increases:

Select if the statement is true or false.

A winding mountain road is an example of a wedge.

Select if the statement is true or false.

A screw decreases the amount of work done.

Select if the statement is true or false.

Screws can be used to raise or lower heavy objects.

Which of the following is not an example of a wedge?

Complete the sentence.

Using wheels as rollers reduces ..............

Adding a rod to the wheel makes which simple machine?

How much force is need to move an object if the wheel is large?

Complete the sentence.

A ................... is a group of wheels working together.

Select if the statement is true or false.

When a large gear turns a small one, the speed of the smaller gear is faster than the large gear.

Select if the statement is true or false.

The difference between a wheel and a gear is that the wheel is a roller and a gear is notched.

A set of two or more pulleys with ropes used to move objects is which type of pulley? 

Complete the sentence.

.......................... advantage is the force gained by using machines.

Select if the statement is true or false.

A fixed pulley has a higher mechanical advantage than a block and tackle pulley.

What is a pulley?

Complete the sentence.

A pulley with three wheels will have a ....................... mechanical advantage than a pulley with two wheels.

What is this picture an example of?

Match the type of simple machine to each modern tool in the following list.

seesaw

Match the type of simple machine to each modern tool in the following list.

knife

Match the type of simple machine to each modern tool in the following list.

ramp

Match the type of simple machine to each modern tool in the following list.

doorknob

Match the type of simple machine to each modern tool in the following list.

Piano Stool

Match the type of simple machine to each modern tool in the following list.

Flagpole

The object being moved is called the:

Match the type of simple machine to each modern tool in the following list.

hammer

Match the type of simple machine to each modern tool in the following list.

Nail

Match the type of simple machine to each modern tool in the following list.

Spiral Stairway

Match the type of simple machine to each modern tool in the following list.

Steering Wheel

Every lever must have a support point called a:

The closer the fulcrum of a lever is to the load, the

Simple machines make doing work harder.

An inclined plane helps us to do work by providing a sloping surface over which the load is gradually raised.

We carry the load over an inclined plane further but with less:

The pulley and the gear are forms of the:

The wedge and screw are forms of the:

The simple machine used to split things apart is called a:

Any wheel used as a roller helps us do work by reducing:

The larger the wheel, more force is needed to lift the load.

To gain speed, bicycles use wheels in the form of:

A single pulley can only change the direction in which the load can move.

The more pulleys used to raise a load, the less effort is needed to do the work.

Which of the following is an inclined plane shaped like a screw?

Mechanical advantage is important in measuring how useful any machine is.

All compound machines are huge.

It is never difficult to recognize the simple machines used to make up a compound machine.

Muscles alone can do more work than machines used with muscles.

Which of the following machines might be used in the construction of a large building?

A machine made of two or more simple machines is called a .................... machine.

A shovel is a simple machine.

Which of the following are compound machines?

Compound machines are always very complicated.

It is sometimes hard to tell which simple machines are used in compound ones.

Compound machines are always very big.

Compound machines use two or more simple machines working together.

A simple machine to split things apart is a wheel and axle.

Friction pulls things toward the center of the earth.

Gears are sets of wheels working together.

Which of the following is an example of a compound machine?

Which of the following is not an example of a compound machine?