In class problems fall 2016
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The document contains 3 word problems involving motion: 1) Calculating the average speed of a person biking and walking to a store 6 miles away. 2) Calculating the average speed of a person walking, running, stopping, and walking in opposite directions. 3) Determining the point where a ball thrown vertically upward has the smallest acceleration.
In class problems fall 2016
- 2. . • Question 1 • Michael is going to the store 6 miles away. He rides his bike at 12 mph for the first half of the trip, then walks at 4 mph for the remainder. • Michael’s average speed for the trip to the store is closest to: • 1. 2 mph • 2. 4 mph • 3. 6 mph • 4. 8 mph • 5. 10 mph • 6. 12 mph • 7. 14 mph • 8. exactly halfway between two of the values above • 9. impossible to determine
- 3. ■ Wendy walks 10 m in one direction at 2 m/s, then runs 6 m in the same direction at 6 m/s. Next, she stops for 4 seconds, and finally walks in the opposite direction at 4 m/s for 6 seconds. • Wendy’s average speed is closest to: • 1. 1 • 2 m s • 2. 1 m s • 3. 1 1 • 2 m s • 4. 2 m s • 5. 2 1 • 2 m s • 6. 3 m s • 7. 3 1 • 2 m s • 8. 4 m s • 9. the negative of one of the choices above • 10. impossible to determine
- 5. • A ball is thrown straight up into the air. Its position at 7 instants of time are shown in the figure; • the maximum height is reached at position 4. At which of the labeled points is the acceleration • of the ball smallest? • 1. point 1 • 2. point 2 • 3. point 3 • 4. point 4 • 5. point 5 • 6. point 6 • 7. point 7 • 8. Exactly 2 of the points shown • 9. More than 2 of the points shown • 10. Impossible to determine