Physics

# Multiple Choice

PhysicsMultiple Choice

### 2.1Relative Motion, Distance, and Displacement

25.
Why should you specify a reference frame when describing motion?
1. a description of motion depends on the reference frame
2. motion appears the same in all reference frames
3. reference frames affect the motion of an object
4. you can see motion better from certain reference frames
26.
Which of the following is true for the displacement of an object?
1. It is always equal to the distance the object moved between its initial and final positions.
2. It is both the straight line distance the object moved as well as the direction of its motion.
3. It is the direction the object moved between its initial and final positions.
4. It is the straight line distance the object moved between its initial and final positions.
27.
If a biker rides west for 50 miles from his starting position, then turns and bikes back east 80 miles. What is his net displacement?
1. 130 miles
2. 30 miles east
3. 30 miles west
4. Cannot be determined from the information given
28.
Suppose a train is moving along a track. Is there a single, correct reference frame from which to describe the train’s motion?
1. Yes, there is a single, correct frame of reference because motion is a relative term.
2. Yes, there is a single, correct frame of reference which is in terms of Earth’s position.
3. No, there is not a single, correct frame of reference because motion is a relative term.
4. No, there is not a single, correct frame of reference because motion is independent of frame of reference.
29.

If a space shuttle orbits Earth once, what is the shuttle’s distance traveled and displacement?

1. Distance and displacement both are zero.
2. Distance is circumference of the circular orbit while displacement is zero.
3. Distance is zero while the displacement is circumference of the circular orbit.
4. Distance and displacement both are equal to circumference of the circular orbit.

### 2.2Speed and Velocity

30.
Four bicyclists travel different distances and times along a straight path. Which cyclist traveled with the greatest average speed?
1. Cyclist 1 travels $95 m$ in $27 s$.
2. Cyclist 2 travels $87 m$ in $22 s$.
3. Cyclist 3 travels $106 m$ in $26 s$.
4. Cyclist 4 travels $108 m$ in $24 s$.
31.

A car travels with an average velocity of 23 m/s for 82 s. Which of the following could NOT have been the car's displacement?

1. 1,700 m east
2. 1,900 m west
3. 1,600 m north
4. 1,500 m south
32.
A bicyclist covers the first leg of a journey that is $d 1 meters$ long in $t 1 seconds$, at a speed of $v 1 m slash s$, and the second leg of $d 2 meters$ in $t 2 seconds$, at a speed of $v 2 m slash s$. If his average speed is equal to the average of $v 1$ and $v 2$, then which of the following is true?
1. $t 1 equals t 2$
2. $t 1 not-equals t 2$
3. $d 1 equals d 2$
4. $d 1 not-equals d 2$
33.
A car is moving on a straight road at a constant speed in a single direction. Which of the following statements is true?
1. Average velocity is zero.
2. The magnitude of average velocity is equal to the average speed.
3. The magnitude of average velocity is greater than the average speed.
4. The magnitude of average velocity is less than the average speed.

### 2.3Position vs. Time Graphs

34.

What is the slope of a straight line graph of position vs. time?

1. Velocity
2. Displacement
3. Distance
4. Acceleration
35.

Using the graph, what is the runner’s velocity from 4 to 10 s?

1. –3 m/s
2. 0 m/s
3. 1.2 m/s
4. 3 m/s

### 2.4Velocity vs. Time Graphs

36.
What does the area under a velocity vs. time graph line represent?
1. acceleration
2. displacement
3. distance
4. instantaneous velocity
37.
An object is moving along a straight path with constant acceleration. A velocity vs. time graph starts at $0$ and ends at $10 m slash s$, stretching over a time-span of $15 s$. What is the object’s net displacement?
1. $75 m$
2. $130 m$
3. $150 m$
4. cannot be determined from the information given