Newtons 2nd Law Review

What force would cause a skateboarder on a flat sidewalk to eventually stop?

• grease between the wheels

• friction between the wheels and sidewalk

• no force, objects naturally will come to rest.

• gravitational force

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NGSS.MS-PS2-2

What is the net force?

• 40 N left

• 0 N Balanced

• 400 N right

• 40 N right

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NGSS.MS-PS2-2

The sum of all of the forces acting on an object

• Net Force

• Inertia

• Gravity

• Newton

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The tendency to resist a change in motion also could be thought of as "laziness."

• Net Force

• Gravity

• Inertia

• Balanced Forces

When the net force adds up to zero, the forces are ____.

• unbalanced and acceleration occurs

• balanced and acceleration occurs

• unbalanced and there is no acceleration.

• balanced and there is no acceleration.

The force that results from contact between an object moving on a surface is

• Friction

• Gravity

• Inertia

• Tension

Motion is always opposed by this force

• Gravity

• Inertia

• Friction

• Tension

The metric unit for force is ______.

• kg

• m/s/s

• m/s

• N

• lb

The amount of inertia an object has depends on the object's ____

• Mass
• Size
• Speed
• Shape

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NGSS.MS-PS2-2

What is the relationship between mass and acceleration?

• Inverse; as mass increases, acceleration decreases

• Direct; as mass increases, acceleration decreases

• Inverse; as mass increases, acceleration increases

• Direct; as mass increases, acceleration increases

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NGSS.MS-PS2-2