Newton's Laws of Motion: Self-Test

Newton's first law

An object at rest tends to stay at and an object in motion tends to stay in in a line at a constant

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State Newton's second law in equation form

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Is acceleration a scalar or a vector quantity?

volume_mute

scalar

vector

none of the above

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What is the acceleration of the object?

Three newtons are exerted northward on a 10-kg object while 4 newtons are exerted southward. What is the acceleration of the object?

Acceleration = m/s²
Direction =

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What is the unit of force in the SI system?

Missing

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How much does a 3-kg object weigh?

weigh = N

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Explain why a heavier object does not fall faster

volume_mute

Explain why a heavier object does not fall faster when dropped since the accelerating force (its weight) is greater.

Explanation:

its mass is greater by just the _______ as its weight. Thus, an application of Newton's second law (F = ma) results in the same acceleration

same ratio

double ratio

1/2 ratio

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Does an object continue to accelerate if dropped from a tall building?

volume_mute

The acceleration of gravity is 9.8 m/s² downward. In actual practice, does an object continue to accelerate if dropped from a tall building?

Yes

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Whirling a shoe tied to a rope above your head

You have tied a shoe to a rope and are whirling it above your head. The following are the forces on the shoe. State the direction of each force

Gravity (1)
String (2)
Air friction (3)

drag and drop the selected option to the right place

pulls inward toward the center

pulls downward on the shoe

acts in the direction opposite to the motion of the shoe

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State Newton's third law

For every force object X exerts on Y, Y exerts an equal and force on

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Corresponding reaction force

volume_mute

My weight is the result of the earth's gravitational force on my body. The corresponding reaction force is my body's gravitational force on the earth.

True

False

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POINTS (1)

Newton's first law

Correct Answer

Explanation

State Newton's second law in equation form

Correct Answer

Explanation

Is acceleration a scalar or a vector quantity?

Correct Answer

Explanation

What is the acceleration of the object?

Correct Answer

Explanation

What is the unit of force in the SI system?

Correct Answer

Explanation

How much does a 3-kg object weigh?

Correct Answer

Explanation

Explain why a heavier object does not fall faster

Correct Answer

Explanation

Does an object continue to accelerate if dropped from a tall building?

Correct Answer

Explanation

Whirling a shoe tied to a rope above your head

Correct Answer

Explanation

State Newton's third law

Correct Answer

Explanation

Corresponding reaction force

Correct Answer

Explanation

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