Forces and motion

What is one way to reduce friction?

• Put sandpaper between the surfaces that touch.
• Push the surfaces closer together.
• Shine a light on the surfaces.
• Put a slippery substance between the surfaces.

Which type of force(s) will cause a change in an object's motion?

• gravity
• zero net force
• balanced forces
• unbalanced forces

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In order for friction to be present, two surfaces must be in contact with each other.

• False

• True

What type of force is being illustrated?

• balanced force
• unbalanced force

This is an example of a(n) _______________ force.

• Newton

• Electromagnetic

• Unbalanced

• Balanced

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NGSS.MS-PS2-1

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A ball is resting on the ground. In order to get the ball to move, you will need to apply a(n)

• unbalanced force

• balanced force

• net force

• friction

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NGSS.MS-PS2-2

You are pulling a wagon with one child in it. All of a sudden, two more kids jump in the wagon. You will need more force to pull the wagon.

• True

• False

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NGSS.MS-PS2-2

Balanced or Unbalanced?

• Balanced 
• Unbalanced

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If two different balls are kicked with the same force, which ball will go the farthest?

• ball with the smaller mass

• ball with the greater mass

• ball with the greater friction

• ball with the smaller diameter ball with the smaller diameter

Tags

NGSS.MS-PS2-1

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A _____ is a pull or a push.

• force
• friction
• gravity
• speed

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