Question 1

Which of the following statements best distinguishes between distance and displacement for an object moving along a straight line?

Accepted Answer

Distance is the total length of the path traveled, while displacement is the straight-line change in position from initial to final point.

Question 2

A runner completes one lap around a 400 m circular track, starting and ending at the same point. What are the runner's distance traveled and displacement after one lap?

Accepted Answer

Distance = $$400 m$$, Displacement = $$0 m$$

Question 3

Given the position-time graph of an object moving in one dimension, what does the slope of the graph at any point represent?

Accepted Answer

The object's instantaneous velocity at that point

Question 4

A car moves from $$x_1 = 2.0$ m to x_2$ = -3.0 m in$$ $$5.0 s. $$What is its average velocity?

Accepted Answer

$$-1.0 m/s$$

Question 5

Which of the following is a correct statement about scalar and vector quantities?

Accepted Answer

Vectors have both magnitude and direction, while scalars have only magnitude.

Question 6

A ball rolls along a straight line. Its position at $$t = 0 s is$$ $$x = 1.4 m$$, and at $$t = 2.0 s it is at$$ $$x = 3.1 m. $$What is the ball's average velocity?

Accepted Answer

$$0.85$$ 	ext{ m/s}$

Question 7

Which of the following best describes the difference between average speed and average velocity?

Accepted Answer

Average speed is the total distance divided by time, while average velocity is the total displacement divided by time.

Question 8

A person walks $$3 m $$east, then $$4 m $$west. What is the person's displacement and distance traveled?

Accepted Answer

Displacement = $$1 m $$east, Distance = $$7 m$$

Question 9

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 10

A motion diagram shows an object with dots spaced increasingly farther apart as time progresses. What does this indicate about the object's motion?

Accepted Answer

The object is speeding up.

Question 11

If a position vs. time graph is a straight line with a negative slope, what does this tell you about the object's motion?

Accepted Answer

The object is moving at constant speed in the negative direction.

Question 12

A cyclist travels $$2.0 km $$east, then $$2.0 km $$west, taking $$0.5$$ hours for the entire trip. What is the cyclist's average speed and average velocity?

Accepted Answer

Average speed = $$4.0 km/h$$, Average velocity = $$0 km/h$$

Question 13

Which of the following best describes a unit vector?

Accepted Answer

A vector with a magnitude of one and a specified direction.

Question 14

In a right-handed Cartesian coordinate system, which statement is correct?

Accepted Answer

The x, y, and z axes are all perpendicular to each other.

Question 15

A car moves from $$x = -2.0 m to$$ $$x = 4.0 m in$$ $$3.0 s. $$What is its average velocity?

Accepted Answer

$$2.0$$ 	ext{ m/s}$

Question 16

Which of the following is a correct method for adding two vectors graphically?

Accepted Answer

Place the tail of the second vector at the head of the first vector, then draw the resultant from the tail of the first to the head of the second.

Question 17

A position-time graph for a ball rolling on a surface is a horizontal line. What does this indicate about the ball's motion?

Accepted Answer

The ball is at rest.

Question 18

Which of the following is true about the laws of physics as described in the study materials?

Accepted Answer

They are expressed equally well in all coordinate systems.

Question 19

A student claims that the average speed of an object can be negative. Is this correct? Why or why not?

Accepted Answer

No, because speed is the magnitude of velocity and is always positive or zero.

Question 20

A ball moves from $$x = 0 m to$$ $$x = 2.0 m$$, then back to $$x = 0 m. $$What are the total distance traveled and the displacement?

Accepted Answer

Distance = $$4.0 m$$, Displacement = $$0 m$$

Motion in One Dimension: Position, Displacement, and Velocity (PHYS 2110 Mechanics)

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