Work and Force

Identify whether work is done or not in the picture

• Yes

• No

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Identify the simple machine

• Lever

• Wheel and axle

• Wedge

• Pulley

A student throws a ball. Which best describes the moving ball?

• The ball has no energy.

• The ball has kinetic energy.

• The ball is transferring the sound energy to the air.

• The ball is transferring light energy to the air.

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

A student has 2 boxes that need to be moved. Box A is filled with heavy dishes and glasses. Box B is filled with ping pong balls. Both boxes are the same size. Which box requires the student to use more force to move it? Why?

• Box A will require more force because the mass of the dishes are less than the ping pong balls.

• Box B will require more force because more ping pong balls can fill the box.

• Box A will require more force because the mass is greater in that box.

• Both boxes will require the same amount of force because the boxes are the same.

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

A Student has 2 boxes that need to be moved. Box A is filled with heavy dishes and glasses. Box B is filled with ping pong balls. Both boxes are the same size. If the student used the same amount of force on boxes A and B, what would happen? Explain why?

• Box A would move farther than Box B because it has a greater volume.

• Box B would move farther than Box A because it has less mass.

• Box A would move farther because it has greater mass.

• Both boxes will move the same distance because they are the same size.

Tags

NGSS.MS-PS2-2

Which statements are true about the bookcases shown in the pictures above? You will need to choose 2 answers.

• Bookcase 2 has a greater mass than bookcase 1.

• Bookcase 1 has a greater mass than bookcase 2.

• More force is probably being applied to bookcase 2.

• Both bookcases have kinetic energy while being pushed.

• If given the same amount of force, bookcase 1 will move farther than bookcase 2.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

A student wants to design and conduct an investigation to determine the effect of friction on moving objects. The student has 4 blocks of the same size. Each block is covered with a different material (sandpaper, silk, fur, and felt). The student uses a baking sheet as a ramp. The student tests each block 5 times as he pushes them down the ramp with the same amount of force. He uses a ruler to measure how far the block travels down the ramp. The student records his data and makes a conclusion. What is the dependent variable in this investigation?

• the distance each block travels

• the number of times it is tested

• the amount of force used to push the blocks

• the 4 kinds of materials used to cover the blocks

Tags

NGSS.MS-PS2-2

A student wants to design and conduct an investigation to determine the effect of friction on moving objects. The student has 4 blocks of the same size. Each block is covered with a different material (sandpaper, silk, fur, and felt). The student uses a baking sheet as a ramp. The student tests each block 5 times as he pushes them down the ramp with the same amount of force. He uses a ruler to measure how far the block travels down the ramp. The student records his data and makes a conclusion.

Identify the constants in this investigation. (3 answers)

• the distance each block travels

• the amount of force used to push the blocks

• the kind of ramp being used to test the blocks

• the 4 kinds of materials used to cover the blocks

• the number of times each block is tested

Tags

NGSS.MS-PS2-2

What is a push or pull?

• force

• shape

• motion

• friction

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

what kind of energy do all moving objects have?

• kinetic energy

• solar energy

• renewable energy

• light energy

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5