Q: A car moves at a constant speed of $$20\ \mathrm{m/s}$$ for $$5\ \mathrm{s}. $$What distance does it travel?

$$d = 20 \times 5 = 100\ \mathrm{m}$$

Question 1

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

Accepted Answer

Speed measures how fast an object moves, while velocity measures how fast and in what direction an object moves.

Question 2

A car travels from position $$x_i = -5\ \mathrm{miles} to$$ $$x_f = +4\ \mathrm{miles}. $$What is the car's displacement?

Accepted Answer

$$\Delta x = 9\ \mathrm{miles}$$

Question 3

A runner moves 100 m east, then 60 m north. What is the magnitude of her displacement?

Accepted Answer

$$\sqrt{100^2$ + 60^2$} = 116\ \mathrm{m}$$

Question 4

Which of the following is NOT a vector quantity?

Accepted Answer

Speed

Question 5

A car moves at a constant speed of $$20\ \mathrm{m/s}$$ for $$5\ \mathrm{s}. $$What distance does it travel?

Accepted Answer

$$d = 20 	imes 5 = 100\ \mathrm{m}$$

Question 6

If a measurement is recorded as $$0.00520$$, how many significant figures does it have?

Accepted Answer

3

Question 7

A student adds $$18.54$$ and $$106.6. $$What is the correct answer with the proper number of decimal places?

Accepted Answer

$$125.1$$

Question 8

Which of the following best describes the process of adding two vectors graphically?

Accepted Answer

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

Question 9

A ball is thrown and follows a parabolic path. Which type of motion is this?

Accepted Answer

Projectile motion

Question 10

Convert $$60\ \mathrm{mi} to $$kilometers using $$1\ \mathrm{mi} = 1.609\ \mathrm{km}. $$What is the answer with the correct number of significant figures?

Accepted Answer

$$97\ \mathrm{km}$$

Question 11

A car moves from $$x_i = 20\ \mathrm{m} at$$ $$t_i = 12\ \mathrm{s} to$$ $$x_f = 25\ \mathrm{m} at$$ $$t_f = 17\ \mathrm{s}. $$What is its average velocity?

Accepted Answer

$$v_{avg} = \frac{25 - 20}{17 - 12} = 1\ \mathrm{m/s}$$

Question 12

Which of the following is the correct scientific notation for the number $$0.0000075$$?

Accepted Answer

$$7.5 	imes 10$$^{-6}$$

Question 13

A vector has a magnitude of $$10$$ units and points $$30^\circ$$ north of east. What are its components?

Accepted Answer

$$x = 10 \cos 30^\circ$$, $$y = 10 \sin 30^\circ$$

Question 14

Which of the following statements about significant figures is correct?

Accepted Answer

The result of a multiplication should have as many significant figures as the number with the fewest significant figures.

Question 15

A cyclist travels 40 m east, then 30 m west. What is the total distance traveled and the displacement?

Accepted Answer

Distance = 70 m, Displacement = 10 m east

Question 16

Which of the following is a correct SI unit for velocity?

Accepted Answer

$$\mathrm{m/s}$$

Question 17

A student multiplies $$3.73 by$$ $$5.7. $$What is the answer with the correct number of significant figures?

Accepted Answer

$$21$$

Question 18

Which of the following best describes the meaning of displacement?

Accepted Answer

The straight-line distance and direction from the initial to the final position.

Question 19

A car moves twice as far as a bicycle in the same time interval. What can you conclude about their speeds?

Accepted Answer

The car's speed is twice the bicycle's speed.

Chapter 1: Motion in One Dimension – Structured Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards