Question 1

A ball rolls along a straight line on a smooth surface. Its position is recorded at equal time intervals, resulting in a motion diagram with dots spaced increasingly farther apart. What does this indicate about the ball's motion?

Accepted Answer

The ball is speeding up.

Question 2

Which of the following best describes the difference between distance and displacement for a moving object?

Accepted Answer

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

Question 3

A runner moves from $$x_1 = 2.3$$\ \mathrm{m}$$ to x_2$ = 4.7\ \mathrm{m} in$$ $$3.0\ \mathrm{s}. $$What is the runner's average velocity?

Accepted Answer

$$0.8\ \mathrm{m/s}$$

Question 4

Which of the following quantities is a vector?

Accepted Answer

Displacement

Question 5

A car travels $$100\ \mathrm{m}$$ east, then $$50\ \mathrm{m}$$ west. What is the car's displacement?

Accepted Answer

$$50\ \mathrm{m}$$ east

Question 6

Which statement about average speed and average velocity is correct?

Accepted Answer

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

Question 7

Given a position vs. time graph with a straight, upward-sloping line, what can you conclude about the object's motion?

Accepted Answer

The object is moving at a constant velocity in the positive direction.

Question 8

A person walks $$3\ \mathrm{m}$$ north, then $$4\ \mathrm{m}$$ east. What is the magnitude of their displacement?

Accepted Answer

$$5\ \mathrm{m}$$

Question 9

Which of the following is NOT a scalar quantity?

Accepted Answer

Velocity

Question 10

A ball moves from $$x_i = -1.3\ \mathrm{m} to$$ $$x_f = 0.4\ \mathrm{m}. $$What is its displacement?

Accepted Answer

$$1.7\ \mathrm{m}$$

Question 11

Which of the following best describes a unit vector?

Accepted Answer

A vector with magnitude equal to one.

Question 12

If a position vs. time graph has a slope that changes from positive to negative, what does this indicate about the object's motion?

Accepted Answer

The object changes direction.

Question 13

A cyclist travels $$2.00\ \mathrm{km}$$ east, then $$2.00\ \mathrm{km}$$ west. What is the total distance traveled and the displacement?

Accepted Answer

Total distance: $$4.00\ \mathrm{km}$$, Displacement: $$0\ \mathrm{km}$$

Question 14

Which of the following is true about the laws of physics?

Accepted Answer

They are the same everywhere and in all coordinate systems.

Question 15

A position vs. time graph for a ball rolling on a surface shows a curve with increasing slope. What does this indicate about the ball's velocity?

Accepted Answer

The ball's velocity is increasing.

Question 16

Which of the following is the correct formula for average velocity?

Accepted Answer

$$v_{avg} = \dfrac{\Delta x}{\Delta t}$$

Question 17

A student walks $$5\ \mathrm{m}$$ east, $$3\ \mathrm{m}$$ west, and $$2\ \mathrm{m}$$ east. What is the student's displacement?

Accepted Answer

$$4\ \mathrm{m}$$ east

Question 18

Which of the following statements about coordinate systems is correct?

Accepted Answer

The choice of origin and axes is arbitrary and can be chosen for convenience.

Question 19

A position vs. time graph for a runner shows a horizontal line. What does this indicate about the runner's motion?

Accepted Answer

The runner is stationary.

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

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