What can be inferred about the action and reaction forces from the observations of a student letting a balloon go?

• The forces act in the same direction.

• The forces are unequal in magnitude.

• The action force results in the formation of the reaction force.

• The reaction force is larger than the action force.

Tags

NGSS.MS-PS2-1

A box is placed on a table, and forces are applied to the box in different directions.

Under which conditions will the box remain stationary?

• A

• B

• C

• D

Tags

NGSS.MS-PS2-2

The student concludes that the acceleration of an object depends only on the force

applied on the object.

Why should the student revise the conclusion?

• The student only uses two marbles in the experiment.

• The student does not describe the force of each push effort in units of Newton.

• The student does not consider the effect of mass on the motion of the marble.

• The student only tests the motion of the marble on one type of surface.

Tags

NGSS.MS-PS2-2

Between which time interval is the puppy’s average speed the greatest ?

• 1 and 2 seconds

• 2 and 3 seconds

• 8 and 9 seconds

• 11 and 12 seconds

What is the best description of the puppy’s motion between 9 and 11 seconds?

• The puppy runs backward, moving further away from the bench for 2 seconds.

• The puppy stands still for 2 seconds before moving further away from the bench.

• The puppy turns around and is running back toward the bench for 2 seconds.

• The puppy runs down a small hill for 2 seconds before running back toward the bench.

Tags

NGSS.MS-PS3-1

Which examples support Newton’s third law of motion?

• 1, 2, and 3

• 1, 2, and 4

• 1, 3, and 4

• 2, 3, and 4

Tags

NGSS.MS-PS2-1

Which table represents the force that the nail exerts on the hammer for each strike?

• 
• 
• 
• 

Tags

NGSS.MS-PS2-1

If the object is not in motion, what is the value of force X?

• 25 N

• 50 N

• 490 N

• 980 N

A person places a box partially full of clothes on one end of a table. How can the person increase the force exerted by the table on the box?

• Add more clothes to the box.

• Remove clothes from the box.

• Move the box to the middle of the table.

• Rotate the box so that its side is resting on the table.

Tags

NGSS.MS-PS2-2

A space agency performs experiments on four different types of rockets in outer space. All four rockets move through the vacuum of space at the same rates.

Which rocket will require the greatest amount of force to change its direction?

• a rocket with a mass of 2 kilograms

• a rocket with a mass of 4 kilograms

• a rocket with a mass of 6 kilograms

• a rocket with a mass of 8 kilograms

Tags

NGSS.MS-PS2-2