Q: A radio signal travels at $$3.0 \times 10^8$\ \mathrm{m/s}. $$How far does it travel in 20 minutes?

$$3.6 \times 10$$^{11}$$\ \mathrm{m}$$

Question 1

A car travels 150 km in 3 hours, moving at a constant speed. What is the average speed of the car in m/s?

Accepted Answer

$$13.9\ \mathrm{m/s}$$

Question 2

Which of the following quantities is a vector?

Accepted Answer

Displacement

Question 3

A jogger runs 200 m east, then 120 m west. What is the jogger's displacement?

Accepted Answer

$$80\ \mathrm{m}$$\ east

Question 4

Convert 90 km/h to m/s.

Accepted Answer

$$25\ \mathrm{m/s}$$

Question 5

A radio signal travels at $$3.0 	imes 10^8$\ \mathrm{m/s}. $$How far does it travel in 20 minutes?

Accepted Answer

$$3.6 	imes 10$$^{11}$$\ \mathrm{m}$$

Question 6

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

Accepted Answer

Speed is a scalar, velocity is a vector.

Question 7

A person walks from their house to the park (0.75 mi), then to the library (0.60 mi), and finally to their friend's house (0.35 mi). What is the total distance traveled?

Accepted Answer

$$1.70\ \mathrm{mi}$$

Question 8

A position-time graph shows a straight line with a positive slope. What does this indicate about the object's motion?

Accepted Answer

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

Question 9

If the Sun is $$1.5 	imes 10^8$\ \mathrm{km}$$ from Earth and light travels at $$3.0 	imes 10^8$\ \mathrm{m/s}$$, how long does it take sunlight to reach Earth?

Accepted Answer

$$500\ \mathrm{s}$$

Question 10

Which of the following is an example of a scalar quantity?

Accepted Answer

Speed

Question 11

A runner completes one full lap around a 100 m by 30 m track, starting and ending at the same point. What is the runner's displacement?

Accepted Answer

$$0\ \mathrm{m}$$

Question 12

A graph of $$y = x^2$ represents which type of relationship?

Accepted Answer

Parabolic relationship

Question 13

A car travels 22 km in 15 minutes. What is its average speed in km/h?

Accepted Answer

$$88\ \mathrm{km/h}$$

Question 14

Which of the following best describes displacement?

Accepted Answer

The shortest distance between two points, with direction

Question 15

Convert 165 lbs to kg. (1 kg = 2.2046 lb)

Accepted Answer

$$74.8\ \mathrm{kg}$$

Question 16

Which of the following statements about vectors is correct?

Accepted Answer

Vectors have both magnitude and direction.

Question 17

A position-time graph has a zero slope. What does this indicate?

Accepted Answer

The object is at rest.

Question 18

A person walks 3 meters east, then 8 meters west. What is the total distance walked and the displacement?

Accepted Answer

Distance: $$11\ \mathrm{m}$$, Displacement: $$5\ \mathrm{m}$$ west

Introduction to Motion: Math Review, Unit Conversion, and Describing Motion

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