Science Chapter 3

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1 point

In a car crash, ____ causes a passenger to continue moving forward.

1 point

Scalar quantities describe what?

Magnitude and direction of a force

The weight of an object

Magnitude of a force

The mass of an object

1 point

The SI unit of force is...

Newton

Joule

Kilogram

Watt

1 point

Newton's second law of motion states that the acceleration of an object is equal the the net force divided by the object's

Weight

Power

Mass

Velocity

1 point

When a falling object reaches terminal velocity, the net forces acting upon it become...

1 point

The property of matter that resists changes in motion is called...

Inertia

Friction

Weight

Mass

1 point

When a pair of balanced forces acts on an object, the net force that results is...

equal to zero

equal in size to one of the forces

greater than both forces combined

greater than one of the forces

1 point

In order to double the acceleration of an object without altering its mass, what must happen?

It is impossible

Half the amount of force acting on the object

Reduce friction

Double the amount of force acting on the object

1 point

Newton's third law of motion describes what?

Acceleration of gravity

Balancing forces

Rate of force

Action and reaction forces

10.

1 point

In what direction does friction act?

The same direction as the moving object

The direction opposite to that of the moving object

11.

1 point

A baseball bat exerts a net force of 150 N on a 2 kg ball. What is the ball's acceleration?

0.013 m/s^2

300 m/s

75 m/s^2

75 m/s

12.

1 point

When an unbalanced force acts on an object,

the object's motion does not change

the object's weight decreases

the object's inertia increases

the object accelerates

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