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What is Newton's Second Law of Motion?

Back

Newton's Second Law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. It can be expressed with the formula: F = ma (Force = mass × acceleration).

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NGSS.HS-PS2-1

Front

What is an example of negative acceleration?

Back

A runner slowing to a walk after crossing the finish line is an example of negative acceleration.

Front

What is the difference between action and reaction forces?

Back

Action and reaction forces are equal in magnitude and opposite in direction, as stated in Newton's Third Law of Motion.

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NGSS.MS-PS2-1

Front

What is acceleration?

Back

Acceleration is the rate of change of velocity of an object. It can occur due to an increase or decrease in speed or a change in direction.

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NGSS.MS-PS2-2

Front

What does it mean for an object to be in motion?

Back

An object is in motion if its position changes relative to a reference point over time.

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NGSS.MS-PS3-1

Front

What is inertia?

Back

Inertia is the tendency of an object to resist changes in its state of motion. An object at rest stays at rest, and an object in motion stays in motion unless acted upon by a net external force.

Front

What is an example of Newton's Third Law of Motion?

Back

A rocket traveling forward in space with an equal and opposite force as the jet propulsion shooting backwards is an example of Newton's Third Law.

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NGSS.MS-PS2-1

Front

What is the formula for calculating force?

Back

The formula for calculating force is F = ma, where F is force, m is mass, and a is acceleration.

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NGSS.MS-PS2-2

Front

What is constant velocity?

Back

Constant velocity means an object is moving at a steady speed in a straight line without changing direction.

Front

What is the relationship between mass and acceleration?

Back

According to Newton's Second Law, as mass increases, acceleration decreases if the same force is applied.

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NGSS.MS-PS2-2