Force and Motion

What is the net force on the box shown here?

• 10 N to the left

• 10 N to the right

• 60 N to the left

• 50 N to the right

Which force always pulls downward on objects?

• Support force

• Friction force

• Gravity

• Air resistance

Tags

NGSS.MS-PS2-4

A force is described as...

• A push only

• A pull only

• A push or a pull

• None of the these

A change to an objects motion is caused by...

• Balanced forces

• Unbalanced forces

• Acceleration

• Velocity

Tags

NGSS.MS-PS2-2

Describe the motion of a person not wearing a seat belt if the car stops suddenly.

• The person and car will stop together.

• The person will stop faster than the car because they are lighter.

• The car will stop and the person will keep moving forward because of inertia.

• The car will stop and the person will speed up.

What forces are acting on a dropped book that falls to the floor?

• Gravity only

• Gravity and air resistance

• Air resistance

• Friction only

Tags

NGSS.MS-PS2-2

NGSS.MS-PS2-4

Which ball will hit the ground first?

• Metal first, then plastic, then wood last

• Wood first , then plastic, then metal last

• They will all hit at the same time.

• There is no way to tell.

A falling object is pulled down by the earth. The earth is pulled up toward the object. Why doesn’t the earth move?

• Only the earth has gravity.

• The Earth has a very large mass and a small acceleration.

• The Earth has a very small mass and a large acceleration.

• Air resistance gets in the way.

Tags

NGSS.MS-PS2-4

A duck flies 60 meters in 10 seconds. What is the duck’s speed?

• 600 m/s

• 50 m/s

• 6 m/s

• 70 m/s

What unit do scientists use to measure force?

• Newton

• Grams

• Meters

• Meter per second per second