What is the type of friction caused when an object falls through air?

• air resistance
• inertia
• rolling friction
• terminal velocity

The force of gravity on a person on Earth is called

• free fall
• terminal velocity
• mass
• weight

Tags

NGSS.MS-PS2-4

The tendency of an object to resist change in its motion is known as

• mass
• inertia
• balance
• force

The SI (metric) unit for force is the 

• meter
• kilogram
• pound
• newton

One way to increase acceleration is by

• decreasing force
• increasing both force and mass
• decreasing mass
• increasing mass

Tags

NGSS.MS-PS2-2

What happens when two forces act in the same direction?

• They add together
• The stronger one prevails
• They cancel each other out

Tags

NGSS.MS-PS2-2

Balanced forces acting on an object

• can change the object's motion
• always change the object's motion
• never change the object's motion
• have nothing to do with the motion of an object

The force that pulls falling objects towards Earth is called

• gravity
• acceleration
• free fall
• air resistance

Tags

NGSS.MS-PS2-4

If the teacher puts a force of 20N to move a desk to the right at the same time a student puts a force of 30N to move the desk to the left the

• desk will not move
• the desk will move to the right
• the desk will move to the left.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Newton's second law of motion says WHAT depends on an object's mass the the net force acting on the object

• mass
• acceleration
• gravity
• weirght