Forces and Motion

What is the force that opposes the motion of an object?

• Friction

• Inertia

• Gravity

• Acceleration

What force pulls objects towards the center of the Earth?

• Magnetism

• Friction

• Gravity

• Repulsion

Tags

NGSS.MS-PS2-4

When two forces acting on an object are equal in size but opposite in direction, what is the overall effect on the object?

• Unbalanced forces

• Net force

• Balanced forces

• Zero force

When the forces acting on an object are not equal in size or direction, what is this called?

• Unbalanced forces

• Equal forces

• Parallel forces

• Opposite forces

Tags

NGSS.MS-PS2-2

What is the force that causes a moving object to slow down when it comes into contact with another object?

• Acceleration

• Gravity

• Inertia

• Friction

What happens to the speed of an object if the forces acting on it are unbalanced?

• The object will stop moving.

• The object will move at a constant speed.

• The object will change color.

• The speed of the object will change.

Tags

NGSS.MS-PS2-2

An unbalanced force can make all of these things happen except...

• a moving object changes direction
• an object just sits there
• a moving object speeds up
• a moving object stops

Tags

NGSS.MS-PS2-2

Who is winning this race?

• A
• B

Tags

NGSS.MS-PS3-1

Gravity is a force that can act on an object without touching the object

• True

• False

Tags

NGSS.MS-PS2-4

NGSS.MS-PS2-5

What is the force that pulls all objects toward the center of the Earth?

• unbalanced force

• balanced force

• motion

• gravity

Tags

NGSS.MS-PS2-4