Newton's Law of Motion Review

Which best explains why we are able to accelerate forward when starting to run?

• As one leg moves backward, it provides an equal and opposite force for the other foot to move forward.

• No acceleration takes place. Runners are always at a fixed velocity.

• The striking foot pushes backward against the ground. The friction with the ground provides an equal and opposite force forward.

• The runner's upper body quickly leans forward, causing the entire body to begin accelerating forward

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NGSS.MS-PS2-1

When a large truck pushes a small car with a given force, the small car is applying an equal and opposite force on the truck.

• True

• False

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NGSS.MS-PS2-1

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 

According to Newton’s Law of Inertia, which of the following objects will change its motion?

• A bike rider on a smooth and level road, pedaling at a constant rate.

• A train pulling on another train, each with the same amount of force.

• A chair sitting on the floor with balanced forces acting in opposite directions.

• A ball rolling across the floor with friction acting in the opposite direction.

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NGSS.MS-PS2-2

Newton’s first law of motion: An object at rest remains at rest unless acted on by an _________.

• Unbalanced Force.

• Act of Inertia

• Angry Dog

• Unknown Force

Whats Newtons First Law?

• The more force applied to an object the faster it will accelerate.

• An object in motion will stay in motion and an object at rest will stay at rest unless acted by an outside force.

• for every ection there is an equal and oposite reaction

An object in motion (or at rest) will to stay in motion (or at rest) until an outside force acts upon it.

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

• Newton's 4th Law

A bowling ball is rolled with a certain speed and strikes a bowling pin with a force indicated by the arrow in this illustration. When the bowling ball strikes the bowling pin, the force applied by the pin to the ball -

• depends on the mass of the bowling pin.

• is equal to the force applied by the ball.

• must be zero, since the pin is not moving.

• is equal to the force of gravity on both.

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NGSS.MS-PS2-1

According to Newton's Second Law, How do you calculate force?

• Multiply mass and acceleration

• Divide mass by acceleration

• Divide acceleration by mass

• Divide force by mass

According to Newton's Second Law, How do you calculate mass?

• Multiply mass and acceleration

• Divide force by acceleration

• Divide acceleration by mass

• Divide force by mass