Newton's Law

Looking at the image. Decide if this is balanced or unbalanced.

• Unbalanced

• Balanced

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The girl on the sled will remain in motion unless

• her motion is changed by magnetic forces.

• she is stopped by an outside force.

• she accelerates at a constant speed.

• the force of friction forcer her to move faster.

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NGSS.MS-PS2-2

This is describing the law of

• forces

• inertia

• velocity

• gravity

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NGSS.MS-PS2-2

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The picture shows a weightlifter holding the barbell over his head.

The force of gravity pulling down on the barbell is 756 newtons.

How many newtons of force are exerted by the weightlifter to hold the barbell up?

• No Newtons

• 756 Newtons

• 368 Newtons

• 14767 Newtons

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NGSS.MS-PS2-4

What is the force that the desk exerts on the dictionary?

• none

• 15 N

• 1.5 N

• 150 N

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An automobile you are riding in suddenly stops, but you continue to go forward.

• Newton's
  1st
  Law of Motion

• Newton's
  2nd
  Law of Motion

• Newton's
  3rd
  Law of Motion

"For every action, there is an equal and opposite reaction."

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

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Force = Mass x Acceleration

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

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You push against a wall and the wall is pushing back on you.

• Newton's
  1st
  Law of Motion

• Newton's
  2nd
  Law of Motion

• Newton's
  3rd
  Law of Motion

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NGSS.MS-PS2-1

A sled sliding on a flat, icy surface with a constant velocity is 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.

• Newton’s third law of motion.