Module 2 L1 vocab and check

Match the word with its definition.

• displacement

• the distance an object travels per unit of time

• meter

• the SI unit of length

• motion

• the distance and direction of an object's change in position

• speed

• a change in an object's position relative to a reference point

Average speed is found by _____.

• dividing displacement by the total time spent

• dividing total distance traveled by the total time

• multiplying the displacement by the total time spent

• multiplying total distance traveled by the total time

Instantaneous speed is the rate of motion at an instant in time. Based on this statement, a reasonable conclusion is that if an object’s instantaneous speed does not change over time, then _____.

• the object is quickly speeding up

• the object is very gradually slowing down

• the object is moving at a constant speed

• the object has returned to its beginning position

Which runner has the slowest average speed for this run?

• Bill

• Daisy

• Jane

• Joe

Which of the following do you calculate when you divide the total distance traveled by the total travel time?

• average speed

• constant speed

• variable speed

• instantaneous speed

The movement of the Australian plate pushes Australia north at an average speed of about 17 cm per year. What will Australia’s displacement be in meters in 1,000 years?

• 170 m north

• 170 m south

• 1700 m north

• 1700 m south

If you travel 1.7 km north from your house at noon, and at 6:00 PM you travel 5.4 km south, what is your displacement?

• 3.7 km north

• 3.7 km south

• 7.1 km north

• 7.1 km south

At 8:00 AM you leave home and walk 0.5 km to a friend's house. At 11:30 AM you return home, then travel by car to the mall, which is 10 km away, and arrive at 11:45 AM. What is the total distance traveled?

• 2.8 km/hr

• 10 km

• 10.5 km

• 11 km