Physics - Average Velocity Test

What is the displacement of the object? (1)

1 m

How many times does the particle stop not counting at zero seconds? (1)

1 time

The total distance traveled is? (1)

13 m

A cheetah can maintain its maximum speed of 27.8 m/s for only 30.0 s. What is the minimum distance a gazelle running at 22.2 m/s must be ahead of the cheetah to have a chance of escaping?

168 m

How many times does the particle return to its starting point? (1)

2

When is the particle moving the fastest? (1)

5/6 seconds

At what time (in seconds) does distance and displacement begin to differ? (1)

6/7 seconds

What is the displacement for an object at rest? a. 0.0 m b. 1.0 m c. 9.8 m d. 9.81 m

A

Which of the following is not a vector quantity? a. speed b. velocity c. acceleration d. all are vector quantities

A

Describe the motion depicted by the following velocity-time graph. In your description, make reference to the direction of motion (+ or - direction), the velocity and acceleration and any changes in speed (speeding up or slowing down) during the various time intervals (e.g., intervals A, B, and C). (5)

A: B: Constant, which makes the velocity and acceleration constant. C:

Distance is to displacement as a. velocity is to acceleration b. speed is to velocity c. impulse is to momentum d. force is to weight e. none of the above choices are correct

B

If and object moves with constant acceleration, its velocity must a. always decrease b. be constant also c. change by the same amount each second d. change by varying amounts depending on its speed

C

In the above example, the boy's displacement is? a. 30 meters east b. 150 meters east c. 120 meters east d. 180 meters west

C

Which person(s) has/have a constant, positive, non zero acceleration value? (2)

C

A boy walks 150 meters due east and then turns around and walks 30 meters due west. The boy walked a distance of? a. 30 meters b. 150 meters c. 120 meters d. 180 meters

D

A snail travels 45 cm in 20 minutes. Its average speed is? a. 2.25 cm/hr b. 15 cm/hr c. 90 cm/hr d. 135 cm/hr

D

The two measurements necessary for calculating average speed are? a. acceleration and time b. velocity and distance c. velocity and time d. distance and time e. distance and acceleration

D

Which has zero acceleration? An object a. at rest b. displacement remains constant c. moving at constant velocity d. all of these e. none of these

D

Which of the following represents a speed? a. 6 m b. 4 hr/km sec c. 2 m/sec^2 d. 8 m/sec

D

Which of the following represents an acceleration? a. 16 m^2/sec^2 b. 4 hr/km sec c. 8 km/hr d. 2 m/sec^2

D

Which person has the greatest average speed? (2)

D

Which person has the greatest magnitude of acceleration?

D

Which person(s) changes direction during the time of motion? (2)

D

What are three differences between the terms distance and displacement?

Displacement requires direction and is based off of the total distance. Distance can just be based off of part of a problem.

Which person(s) is/are not moving? (2)

None

The direction the particle is moving at time = 6 seconds. (1)

Positive to Negative

Use the principle of slope to describe the motion of the object depicted by the plot below. In your description, be sure to include such information as the direction of the velocity vector (i.e., positive or negative), whether there is a constant velocity or an acceleration, and whether the object is moving slow, fast, from slow to fast, or from fast to slow. Be complete in your description. (3)

The velocity of the graph is not constant, it is negative. So is the acceleration. The object is moving a slow to fast rate.

A man travels 20 km/h east for 3 hours. He then rest for 1 hour. Next, he travels West at 15 km/h for 2 hours. a. What is his average speed for this trip? b. What is his average velocity for this trip?

a. 15 km/hr b. 5 km/hr E

Consider the graph below. Circle if the following statements are true or false. (4) a. moving in the positive direction b. moving with a constant velocity c. moving with a negative velocity d. slowing down e. speeding up f. moving with a positive acceleration g. moving with a constant acceleration

a. True b. False c. False d. True e. False f. False g. True