Introduction to Linear Motion

Which statement best describes linear motion as introduced in this section?

• Motion that follows a curved path

• Motion in a straight line

• Motion that changes direction continuously

• Random motion with no defined path

Which statement best defines a rate in physics based on the notes?

• How much force an object has at one moment

• How much something changes over time, measured per time taken

• The total amount of distance traveled

• A comparison between two unrelated quantities

Which of the following is NOT a valid example of a rate from the list?

• Heartbeats per minute

• Meals eaten per day

• Inches grown per year

• Total glasses of water per distance

Which expression correctly represents average speed based on the section’s definition?

• total time taken ÷ total distance traveled

• total distance traveled ÷ total time taken

• final speed − initial speed

• distance × time

In the formula v_ave = d / t, what do the symbols d and t stand for?

• density and temperature

• direction and torque

• total distance and total time

• displacement and tension

According to the units listed, which set matches average speed, distance, and time?

• m/s for v_ave, m for d, s for t

• km for v_ave, m/s for d, h for t

• m for v_ave, s for d, m/s for t

• mph for v_ave, m for d, s for t

A car travels 250 meters in 50 seconds. What is its average speed?

• 5 m/s

• 50 m/s

• 0.2 m/s

• 25 m/s

An insect crawls 20 meters during a time of 1800 seconds. What is its average speed?

• 0.011 m/s

• 0.9 m/s

• 9 m/s

• 1.1 m/s

A whale swims for 28,800 seconds at an average speed of 2 m/s. How far does it travel?

• 1,440 m

• 57,600 m

• 14,400 m

• 2,880 m

If a person runs 100 meters in 10 seconds, what is their average speed?

• 1 m/s

• 2 m/s

• 5 m/s

• 10 m/s