Newton's 1st and 2nd Laws

What is inertia?

• the force that opposes motion
• the force of attraction between 2 objects
• an object's tendency to stay in motion or to stay at rest
• a change in an object's speed and/or direction

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NGSS.MS-PS2-2

Which has more Inertia? (and takes more force to move)

• Truck

• Ant

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NGSS.MS-PS2-2

According to Newton’s first law of motion, a moving object that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• accelerate.

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NGSS.3-PS2-1

According to Newton’s first law of motion, an object at rest that is not acted on by an unbalanced force will

• remain in motion.
• eventually come to a stop.
• change its momentum.
• remain at rest

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NGSS.3-PS2-1

If a force of 26 N is exerted on two balls, one with a mass of 0.52 kg and the other with a mass of 0.78 kg, which ball will have the greater acceleration?  (F=ma)

• The one with a mass of .78 kg will have the greatest acceleration.
• The one with a mass of .52 kg will have the greatest acceleration.
• They will both accelerate at the same rate.

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NGSS.MS-PS2-2

A 20 kg bike accelerates at 10 m/s².  what was the force?

• 25 Newtons
• 20 Newtons
• 200 Newtons
• 10 Newtons

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NGSS.MS-PS2-2

A car speeding up, a dog slowing down and person turning around the block are examples of..

• Balanced Forces
• Unbalanced Forces

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NGSS.MS-PS2-2

A bike accelerates at 10 m/s² when a force of 50N is applied.  What is the mass of the bike and its rider?

• 25 kg
• 200 kg
• 20 kg
• 5 kg

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NGSS.MS-PS2-2

If force remains constant, what happens to acceleration if mass is decreased?

• Acceleration decreases.
• Acceleration increases.
• Acceleration remains constant.

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NGSS.MS-PS2-2

If the mass of a marble remains constant, but you apply more force to the marble, how will acceleration be affected?

• acceleration will not be affected.
• acceleration will increase.
• acceleration will decrease.

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NGSS.MS-PS2-2