Forces and Newtons Laws 2

What is a force?

• push
• pull
• push or pull
• Neither one

If the forces on an object do not add up to zero, the forces are ____________________

• balanced
• equal
• unbalanced
• equilibrium

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NGSS.MS-PS2-2

If an object has zero net force, can it be moving? 

• Yes. In constant motion.
• No. It is balanced.
• Yes. It is accelerating.
• No it equals zero.

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NGSS.MS-PS2-2

What is the Net Force?

• 17 N Right
• 3 N Right
• 3 N Left
• 17 N Left

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What is the Net Force?

• 5 N to the right
• 10 N to the right
• 15 N to the right
• 0 N

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NGSS.MS-PS2-2

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An object at rest will _______ if no outside forces are applied.

• Stay at rest
• Increase Velocity
• Decrease Mass
• Go to sleep

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NGSS.MS-PS2-2

An ice skater at rest pushes against a sled at rest, causing both the skater and sled to move away from each other with different accelerations. This is an example best described by

• Newton’s first law of motion for objects at rest.
• Newton’s first law of motion for objects in motion.
• Newton’s second law of motion. F=ma
• Newton’s third law of motion: Equal and opposite reaction

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A crumpled piece of paper hits the ground before a flat sheet of paper because

• the acceleration of gravity is greater on the  crumpled paper.
• there is more air resistance against the flat paper.
• the crumpled paper is more massive
• the crumpled paper is less massive.

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What is the unit measure of Force? 

• Meters/second² (m/s²)
• Joules (J)
• Meters (m)
• Newtons (N)

Which of Newton's laws is illustrated when a magician pulls a tablecloth out from under the dishes without disturbing them?

• first
• second
• third 
• fourth

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