Physical Science Chapter 3

Newton's first law of motion is also called the law of

• mass

• force

• constant velocity

• inertia

Forces that are equal in size but opposite in direction are

• net forces

• balanced forces

• frictional forces

• inertial forces

The upward force on an object falling through the air is

• air resistance

• inertia

• momentum

• terminal velocity

When the drag force on an object falling through the air equals the force of gravity, the object has reached

• terminal force

• terminal illness

• terminal velocity

• terminal acceleration

The relationship among mass, force, and acceleration is explained by

• conservation of momentum

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

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When two balls collide, the momentum of the balls after the collision is explained by

• conservation of momentum

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

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The acceleration due to gravity is

• 98 m/s²

• 9.8 m/s²

• 9.8 m/s

• 0.98 m/s

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The statement "to every action there is an equal and opposite reaction" is

• conservation of momentum

• Newton's 1st Law

• Newton's 2nd Law

• Newton's 3rd Law

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According to Newton's 2nd law of motion

• F = m x a

• F = p x a

• F = p x v

• F = m x v

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When an object moves in a circular path, it accelerates toward the center of the circle as a result of

• frictional force

• gravitational force

• centripetal force

• momentum