Week 20 1. A runner takes 1.5 hours to complete a 6.0-kilometer route. What is the jogger’s average speed? 2.5 km/h c. 7.5 km/h 4.0 km/h d. 9.0 km/h 2. Which of the following is NOT needed to determine the velocity of a moving truck? The mass of the truck The distance it travels The time it takes to travel that distance The direction in which it is traveling

3. It takes 0.5 seconds (s) for a baseball to travel from the pitcher to the batter, who is 20 meters (m) away. What is the speed of the baseball? 10 m/s 25 s/m 40 m/s 100 s/m 4. Two objects travelling at the same speed have different velocities if they start at different times. travel different distances. have different masses. move in different directions.

5. Sandra rides a train a distance of 150 kilometers 5. Sandra rides a train a distance of 150 kilometers. The entire trip takes a total of 3 hours. What is the average speed of the train? 450 km/h 150 km/h 75 km/h 50 km/h 6. Janice drove 120 miles to visit her grandchildren. On the way home, she takes a shortcut and drives 105 miles. What is Janice’s total displacement? 120 miles 105 miles 225 miles 0 miles

7. An object accelerates if its Speed remains constant. Direction changes. Mass remains constant. Motion can be plotted on a graph. 8. Lara navigates her kayak down a stretch of the Savannah river in 15 minutes. Her rate of speed over the course of the trip is 8 km/hr. How far has she traveled? 0.12 km 1.2 km 2 km 120 km

9. Which situation is an example of balanced forces? A roller coaster accelerating down the track. A car coming to a sudden stop. A child bouncing up and down on a trampoline. A flower pot sitting on a windowsill. 10. Calculate the acceleration of a race car driver if he speeds up from 50 m/s to 60 m/s over a period of 5 seconds. 2 m/s2 C. 60 m/s2 5 m/s2 D. 50 m/s2