Newton's 1st Law of Motion--Inertia

What is Newton's First Law known as? The Law of

• Friction
• Mass
• Inertia
• Gravity

What is Newton's First Law

• F=ma
• Every action has an equal and opposite reaction
• An object at rest stays at rest, an object in motion stays in motion. 
• Friction 

A resistance to a change in motion is 

• Acceleration
• Inertia
• Gravity
• Velocity

Which would hit the ground first if dropped from the same height in a vacuum—a feather or a metal bolt?

• the feather

• the metal bolt

• They would hit the ground at the same time.

• They would be suspended in a vacuum.

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Slowing down is called

Choose all that apply.

• negative acceleration

• velocity

• speed

• deceleration

Which of the following is a unit for acceleration?

Choose all that apply.

• km/s

• m/s²

• mi/hr

• ft

• m/s/s

What is velocity?

• the quickness of an object

• speed in a specific direction

• the location of an object

• acceleration

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When a car goes around a corner at 20 mph, why do we say it accelerates?

• The car is accelerating because of the velocity is constant

• Cars always accelerate when they are in motion

• The car is accelerating because it's changing direction

• The car accelerates because it's going 20 mph

A roller coasters accelerates from an initial velocity of 6.0 m/s to a final velocity of 70 m/s over 4 seconds. What's the acceleration? a = v_f - v_i / t

Remember: A = Change in Velocity / time

• 24 m/s²

• 16 m/s

• 18 m/s/s

• 16 m/s²

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A drag racer accelerated from 0 m/s to 200 m/s in 5 s. What was the acceleration? a = v_f - v_i / t

• 0 m/s

• -40 m/s²

• 40 m/s²

• 40 m/s

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