Force, Gravity, and Motion

What will happen if you were to drop a 16mm steel marble and a 16mm cork marble onto the floor from the same height and at the same time?

• The steel marble will land first.

• The cork marble will land first.

• Both the steel marble and the cork marble will land at the same time.

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When you slide a box across the floor, what force must your push be stronger than?

• Support Force

• Friction Force

• Gravity

• Air resistance

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A force is described as . . .

• a push only

• a pull only

• a push or a pull

• none of the above

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What unit do scientists use to measure force?

• Newton

• Grams

• Meters

• Meter per second per second

What is the net force on the box shown in the picture?

• 10 N to the left

• 10 N to the right

• 60 N to the left

• 50 N to the right

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The moon has a smaller mass than the Earth. If you were able to travel to the moon your weight would...

• Increase

• Decrease

• Stay the same

• Vary with day and night

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Which force always pulls downward on objects?

• Support force

• Friction force

• Gravity

• Air resistance

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Test paper is sitting at rest on your desk. Which of the following statements best describes this situation?

• There are no forces acting on your paper.

• Your paper pushes on the desk only.

• The desk pushes on your paper only.

• The forces acting on the paper are balanced.

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

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NGSS.MS-PS2-2

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A change to an object's motion is caused by . . .

• Balanced forces

• Unbalanced forces

• Acceleration

• Velocity

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