Motion, Force and Models

Which one of Newtons Law states unless acted on by an unbalanced force, an object at rest stays at rest and an object in motion stays in motion at a constant velocity.

• Law 2

• Law 1

• Law 3

• none

What formula do you use to find acceleration?

• a = d x f

• a = m+d

• a = f/m

• a= m x a

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What is motion?

• A measure of the distance an object moves in a given amount of time.

• A change in an objects position over time

• the tendency to resist a change

• staying in one place

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NGSS.MS-PS2-2

What law is considered the law of inertia?

• Newton's first law

• Newton's second law

• Newton's third law

• Newton's fourth law

Which forces is a contact force?

• Air resistance

• Magnetic

• Gravity

• Friction

A bus travels north along a straight stretch of road. Its velocity is a constant 15 m/s. Another bus travels south on the same road at the same speed. What is the velocity of the second bus?

• -15 m/s

• 15 m/s

• 0 m/s

• 1 m/s

What object has the most inertia?

• marble

• bike

• car

• semi truck

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What does Newtons second law of motion tell us?

• If you accelerate slow it will be faster than a car.

• If the force remains constant and the mass is decreased, the object will accelerate at a faster rate.

• Nothing.

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You are sitting in a crowded movie theater waiting for friends. The following are ways that you could describe your location within the theater using reference points. Which descriptions may be unreliable because of the reference point?

• I am sitting near a theater worker 5th seat from the side

• I am in the 5th row from the back tenth seat from the right side.

• I am in the 6th row from the front 10th seat from the right side

• I am in the sixth row east of the man in a red shirt

Which one of Newtons laws has to do with action and reaction?

• Newton's first law

• Newton's third law

• Newton's second law

• None.

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