23 Questions
| Total Attempts: 203

Questions and Answers

- 1.Which is the BEST SCIENTIFIC definition of acceleration?
- A.
When motion speeds up.

- B.
When motion slows down.

- C.
When velocity changes.

- D.
When speed changes.

- 2.True or False? "An object CAN travel at constant speed and also be accelerating."
- A.
True

- B.
False

- 3.The earth revolves around the sun at a constant speed (It travels the same distance in the same time or one revolution per year). Which phrase best describes the earth's motion?
- A.
The earth travels equal distance in equal time with no acceleration.

- B.
The earth is revolving at a constant speed with acceleration.

- C.
The earth is revolving at a constant speed and has no acceleration.

- D.
The earth is at rest and the sun revolves around the earth.

- 4.Which of these examples is the MOST used definition for acceleration because the other definitions are not commonly KNOWN or understood by most people. How do you accelerate your automobile?
- A.
Speeding Up from 30 to 60 mph.

- B.
Turning and keeping your speed constant (at 60 mph).

- C.
Slowing down from 60 to 0 mph.

- D.
A and B

- E.
A, B, and C are known by ALL people.

- 5.On the distance-time graph shown below, which motion illustrated is always (constantly) accelerating?
- A.
Red (Line Segments)

- B.
Blue (Curving)

- C.
Green (straight line)

- D.
Red and Blue

- E.
None of these

- 6.Which of these ramps is causing the marble to decelerate? (Assume there is NO FRICTION)
- A.
Marble rolling down a ramp.

- B.
Marble rolling up a ramp.

- C.
Marble rolling on a flat ramp.

- D.
None of these ramps so deceleration.

- 7.Describe the motion illustrated by this graph: Which way is the object moving? What is happening to its speed?
- A.
The object is slowing down while it moves in the negative direction with positive accleration.

- B.
The object is speeding up while it moves in the positive direction with negative acceleration.

- C.
The object is slowing down while it moves in the positive direction with negative acceleration.

- D.
The object is at rest with no acceleration.

- 8.On a velocity time graph, what is the slope when the object travels at constant velocity?
- A.
Positive Slope

- B.
Negatve Slope

- C.
No Slope

- 9.For what interval of time did the car travel at a constant speed?
- A.
0-10 seconds

- B.
10-15 seconds

- C.
15-30 seconds

- D.
0-30 seconds

- 10.What was the initial speed of the object in this graph?
- A.
0.0 m/s

- B.
10 m/s

- C.
30 m/s

- D.
2 m/s

- E.
"u" m/s

- 11.Calculate the acceleration that started at a speed of 20m/s and accelerated to a speed of 50m/s and took from 5.0 to 8.0 seconds to do so. (Find the change in speed and the elapsed time before you calculate the acceleration.) (graph link is broken but you can calculate it anyway.)
- A.
30.0 m/s/s

- B.
10.0 m/s/s

- C.
3.0 m/s/s

- D.
6.0 m/s/s

- 12.Four marbles of different mass roll down the same incline from the identical position of 200 cm up the ramp. (Assume no Friction.) Which marble reaches the bottom of the ramp with the greastest speed?
- A.
Red marble's mass = 20.0 g

- B.
Blue marble's mass = 35.9 g

- C.
Green marble's mass = 50.4 g

- D.
Yellow marble mass = 5.7 g

- E.
They all reach the bottom with the same speed.

- 13.The initial speed of a car is 20 m/s. After 30 seconds it's final speed is 50 m/s. What is the
__average acceleration__of the car for the 30 s of time?- A.
2.0 m/s

- B.
1.0 m/s

- C.
5 m/s/s

- D.
1 m/s/s

- E.
0.0 m/s/s

- 14.Which of these driving practices is NOT an example of acceleration?
- A.
Stepping on the brake pedal.

- B.
Pressing down on the accelerator (gas pedal).

- C.
Alllowing Cruise Control to regulate your rate of motion as the car travels in a straight line.

- D.
Turning the Steering Wheel.

- 15.Which of these are correct metric units for acceleration? (select all correct answers - more than one possible.)
- A.
Kg/s/s

- B.
Km/hr/s

- C.
M/s/s

- D.
M/s

- 16.Which of these is an example of zero acceleration (a = 0.0 m/s/s) acting upon the object?
- A.
Ball thrown into the air and stops at its highest point above the ground.

- B.
A car traveling in a straight line at constant speed.

- C.
A marble rolling up a smooth ramp until it stops before rolling back down the ramp.

- D.
A car turning in a circle at a constant speed.

- 17.The formula for calculating linear acceleration is ....? (or the formula for calculating straight line acceleration is?)
- A.
A = (Vi - Vf) / t

- B.
A = Vf - (Vi/t)

- C.
A = (Vf-Vi)t

- D.
A = (Vf-Vi) / t

- E.
A = Vf/t - Vi

- 18.Calculate the acceleration of a vehicle that slows down from a speed of 30 m/s to 10 m/s in an elapsed time of 4.0 seconds. acceleration = change in velocity divided by time = (Vf-vi) / t
- A.
5 m/s/s

- B.
10 m/s/s

- C.
-10 m/s/s

- D.
-5.0 m/s/s

- E.
0.0 m/s/s

- 19.Which of the dot trails for motion (below) whould show the object is decelerating as it moves to the right. a. * * * * * * * * * * * b. * * * * * * * * * * * c. * * * * * * * * * * * *
- A.
A

- B.
B

- C.
C

- 20.* * * * * * * * * The object is moving to the right. The dot trail for its motion is shown above. Which statement best describes the object motion to the right. (Note the time interval between each dot is constant.)
- A.
The object has constant velocity

- B.
The object is accelerating by gaining speed

- C.
The object is accelerating by reducing its speed

- 21.The dot trail patterns above describe the motion of two different objects. As shown one object was moving FAST and the other was SLOW. What motion do they have in common that is shown by the dot trails?
- A.
Both are accelerating.

- B.
Both moved for the same amout of time.

- C.
Both have constant speed.

- 22.The dot trails above describe the motion of an object moving to the right. Which tape trail above best displays the largest acceleration?
- A.
Top Trail

- B.
Middle Trail

- C.
Bottom trail

- 23.What is assumed or understood to be SAME for the dot trails tapes shown below?
- A.
Distance between the dots.

- B.
Time interval between the dots.

- C.
Type of motion is always acceleration.