2. 1D Motion / Kinematics

Average Velocity

2. 1D Motion / Kinematics

# Average Velocity - Video Tutorials & Practice Problems

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concept

### Intro to Velocity and Speed

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2

Problem

ProblemBeginning from a signpost, you run 60m to the right, then 60m back. The entire trip takes 24 seconds. What is your speed and velocity for the whole trip?

A

Speed = 5 m/s, velocity = 5 m/s

B

Speed = 2.5 m/s, velocity = 0 m/s

C

Speed = 5 m/s, velocity = 0 m/s

D

Speed = 0 m/s, velocity = 0 m/s

3

concept

### Solving Constant and Average Velocity Problems

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4

example

### Baseball Pitch

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5

concept

### Constant Velocity with Multiple Parts

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6

Problem

ProblemYou walk to the right at 3m/s for 8s, then turn around and walk backwards at 2m/s for some unknown time. You end up 16m to the right from where you started. How long did you walk backwards?

A

8.0 s

B

2.3 s

C

16 s

D

4.0 s

7

example

### Race Against Time

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PRACTICE PROBLEMS AND ACTIVITIES (16)

- If you are driving 85 km/h along a straight road and you look to the side for 2.0 s, how far do you travel dur...
- You normally drive on the freeway between San Diego and Los Angeles at an average speed of 105 km/h (65 mi/h),...
- A car is stopped at a traffic light. It then travels along a straight road such that its distance from the lig...
- In an experiment, a shearwater (a seabird) was taken from its nest, flown 5150 km away, and released. The bird...
- Julie drives 100 mi to Grandmother's house. On the way to Grandmother's, Julie drives half the distance at 40 ...
- Larry leaves home at 9:05 and runs at constant speed to the lamppost seen in FIGURE EX2.1. He reaches the lamp...
- Larry leaves home at 9:05 and runs at constant speed to the lamppost seen in FIGURE EX2.1. He reaches the lamp...
- A particle at t₁ = ― 2.0 s is at 𝓍₁ = 5.2 cm and at t₂ = 3.4 s is at 𝓍₂ = 8.5 cm. What is its average veloci...
- A bowling ball traveling with constant speed hits the pins at the end of a bowling lane 16.5 m long. The bowle...
- A horse trots away from its trainer in a straight line, moving 38 m away in 7.4 s. It then turns abruptly and ...
- On an audio compact disc (CD), digital bits of information are encoded sequentially along a spiral path. Each ...
- (II) Two ships need to arrive at a site in the middle of the ocean at the same time. They start out at the sam...
- (II) Digital bits on a 12.0-cm diameter audio CD are encoded along an outward spiraling path that starts at ra...
- (II) The position of an object along a straight tunnel as a function of time is plotted in Fig. 2–40. What is ...
- (II) Every year the Earth travels about 10⁹ km as it orbits the Sun. What is Earth's average speed in km/h?
- (II) An airplane travels 1900 km at a speed of 720 km/h, and then encounters a tailwind that boosts its speed ...