NOS and Forces and Motion Study Guide 2025

The forces acting on an object can either be balanced or unbalanced. If an unbalanced force is applied to an object, what might happen to the object?

• Only the speed of the object might change

• Both the speed and direction of the object might change

• Only the direction of the object might change

• Neither the speed or direction of the object might change

Tags

NGSS.MS-PS2-2

Which pairing matches a force with its correct type?

• air resistance (contact force)

• friction (noncontact force)

• karate chop (noncontact force)

• magnetic force (contact force)

Which of the following four diagrams below shows unbalanced forces with a net force of 7 N?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS2-2

Which diagram shows a net force acting downward?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Tags

NGSS.MS-PS2-4

Which scenario below best describes an experiment?

• A scientist measures the height of roses that receive different types of fertilizers.

• A gardener waters plants every day.

• A student observes birds in a park.

• A chef tries a new recipe.

A student is experimenting with two identical spheres, which are 1 meter apart. Which change will increase the gravitational force of attraction the most?

• Doubling the distance between the spheres

• Decreasing the distance between the spheres by half

• Pushing the spheres 1 cm closer to the other

• Moving the spheres so they are exactly 3 meters apart from each other

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

A student examines the effect of the number of D batteries in a closed circuit on the brightness of a light bulb. Which variable should the student keep constant?

• The type of batteries

• The number of batteries

• The brightness of the light bulb

• The data collected from the light meter

Identify the contact force from the following choices:

• A leaf falls to the ground.

• A girl pulls the plug on her hair dryer.

• A magnet pulls on a nail that is 1 cm away.

• A boy’s hair is pulled toward an electrically charged balloon.

The objects shown in the following diagrams have different masses and are different distances apart. Which diagram shows the two objects that have the greatest force of gravity acting between them?

• A) 5 kg and 5 kg

• B) 5 kg and 10 kg

• C) 10 kg and 10 kg

• D) 5 kg and 5 kg

Tags

NGSS.MS-PS2-4

In the picture below, the masses of the three cars are equal, but the cars each have an additional mass added on top. Which car will have the greatest total mass?

• A) Car with 5 kg additional mass

• B) Car with 10 kg additional mass

• C) Car with 15 kg additional mass

• D) Car with 20 kg additional mass