Solution 4.2

According to the graph, which 2 surfaces have the least friction?

• glass and tile

• carpet and glass

• wood and tile

• glass and wood

The speed of the object in this graph is -

• remaining the same

• unable to be determined

• decreasing

• increasing

Tags

NGSS.MS-PS3-1

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

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

The object is moving. The movement is shown in this line graph.

The speed of the object in this graph is -

• decreasing

• increasing

• remaining the same

• unable to be determined

Tags

NGSS.MS-PS3-1

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

• A

• B

• C

• D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2