### Multiple Choice

### 2.1 Relative Motion, Distance, and Displacement

- a description of motion depends on the reference frame
- motion appears the same in all reference frames
- reference frames affect the motion of an object
- you can see motion better from certain reference frames

- It is always equal to the distance the object moved between its initial and final positions.
- It is both the straight line distance the object moved as well as the direction of its motion.
- It is the direction the object moved between its initial and final positions.
- It is the straight line distance the object moved between its initial and final positions.

- 130 miles
- 30 miles east
- 30 miles west
- Cannot be determined from the information given

- Yes, there is a single, correct frame of reference because motion is a relative term.
- Yes, there is a single, correct frame of reference which is in terms of Earthâ€™s position.
- No, there is not a single, correct frame of reference because motion is a relative term.
- No, there is not a single, correct frame of reference because motion is independent of frame of reference.

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

- Distance and displacement both are zero.
- Distance is circumference of the circular orbit while displacement is zero.
- Distance is zero while the displacement is circumference of the circular orbit.
- Distance and displacement both are equal to circumference of the circular orbit.

### 2.2 Speed and Velocity

- Cyclist 1 travels $95\phantom{\rule{thinmathspace}{0ex}}\text{m}$ in $27\phantom{\rule{thinmathspace}{0ex}}\text{s}$.
- Cyclist 2 travels $87\phantom{\rule{thinmathspace}{0ex}}\text{m}$ in $22\phantom{\rule{thinmathspace}{0ex}}\text{s}$.
- Cyclist 3 travels $106\phantom{\rule{thinmathspace}{0ex}}\text{m}$ in $26\phantom{\rule{thinmathspace}{0ex}}\text{s}$.
- Cyclist 4 travels $108\phantom{\rule{thinmathspace}{0ex}}\text{m}$ in $24\phantom{\rule{thinmathspace}{0ex}}\text{s}$.

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

- 1,700 m east
- 2,000 m west
- 1,600 m north
- 1,500 m south

- She rode the same amount of time each day.
- She rode for different amounts of time each day.
- She rode the same distance each day.
- She rode a different distance each day.

- Average velocity is zero.
- The magnitude of average velocity is equal to the average speed.
- The magnitude of average velocity is greater than the average speed.
- The magnitude of average velocity is less than the average speed.

### 2.3 Position vs. Time Graphs

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

- Velocity
- Displacement
- Distance
- Acceleration

Using the graph, what is the runnerâ€™s velocity from 4 to 10 s?

- â€“3 m/s
- 0 m/s
- 1.2 m/s
- 3 m/s

### 2.4 Velocity vs. Time Graphs

- The rate of acceleration of the car.
- The area enclosed by the carâ€™s trip.
- The carâ€™s displacement during the 10 s.
- The velocity of the car at t = 10 s.

- $75\phantom{\rule{thinmathspace}{0ex}}\text{m}$
- $130\phantom{\rule{thinmathspace}{0ex}}\text{m}$
- $150\phantom{\rule{thinmathspace}{0ex}}\text{m}$
- cannot be determined from the information given