Chapter 11 Motion Test

1.

1 point

The combination of all of the forces acting on an object is known as _______________.

unbalanced force

net force

neutral force

balanced force

2.

1 point

The friction between surfaces that are stationary is called _____________.

rolling friction

kinetic friction

static friction

sliding friction

3.

1 point

The acceleration that occurs in circular motion is known as ___________.

Constant Speed

Circular Acceleration

Acceleration

Centripetal Acceleration

4.

1 point

The slope of a straight line on a speed vs. time graph is equal to the acceleration.

True

False

5.

1 point

Another way to reduce friction is to use _____________, substances that are applied to surfaces to lower the friction between them.

Hydrogen Sulfate

forces

lubricants

nothing

6.

1 point

The ______ of a distance vs. time graph equals speed.

7.

1 point

Which of the following is not an example of balanced forces?

A light hanging from the ceiling.

Two students pushing against one student.

A hat resting on your head.

8.

1 point

What must displacement always indicate?

Direction

Acceleration

Velocity

None of the above

9.

1 point

A flowerpot falls off a second-story windowsill. The flowerpot starts from rest and hits the sidewalk 1.5 s later with a velocity of 14.7 m/s. Find the average acceleration of the flowerpot.

9.8 m/s2 down

4.7 m/s2 up

4.7 m/s2 down

9.8 m/s2 up

10.

1 point

When an object changes position with respect to a frame of reference, the object is not in motion.

True

False

11.

1 point

What is it called when the speed changes by the same amount over each time interval?

Constant Acceleration

Negative Acceleration

Positive Acceleration

Zero Acceleration

12.

1 point

_________: a space between objects, units, points, or states.

13.

1 point

On a distance vs. time graph, time is the independent variable.

True

False

14.

1 point

_________: any action that can change the state of motion of an object.

15.

1 point

Which of the following is the strongest fundamental force?

Gravity

Strong Nuclear Force

Electromagnetic Force

16.

1 point

Alvin ran at a distance of 6 miles in 30 minutes. What is Alvin's speed expressed in miles per second?

0.247 m/s

0.003 m/s

1 m/s

5 m/s

17.

1 point

Which of the following is an example of helpful friction?

A rock on top of your homework on a windy day.

Textured batting gloves used by baseball players.

Sand scattered on icy roads.

All of the above

18.

1 point

Which of the following best describes friction?

The force that opposes the movement of two surfaces that are in contact and are moving over each other.

The force that occurs when a rounded object rolls over a flat surface.

A force that opposes motion between two surfaces that are in contact.

The force that resists the initiation of sliding motion between two surfaces that are in contact and at rest.

19.

1 point

Speed measured in an infinitely small time interval is called __________________________.

Instant Speed

Nano Speed

Instantaneous Speed

Zoom Speed

20.

1 point

Which of the following is not a fundamental force?

Gravity

Friction

Electromagnetic

Strong Nuclear Force