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Speed and Velocity in 2 and 3 Dimensions
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| Tutorial ID | Title | Tutorial | Video Tutorial | Revision Notes | Revision Questions | |
|---|---|---|---|---|---|---|
| 3.6 | Speed and Velocity in 2 and 3 Dimensions |
Speed and Velocity in 2 and 3 Dimensions Revision Questions
1. An object moves from A (- 4m, 6m) to B (12m, 6m) to the reference point. Then, it moves from B (12m, 6m) to C (12m, 0m). The entire motion lasts for 10 s. What are the magnitudes of average speed (< v >) and average velocity (< v⃗ >) of the object?
- Average speed = 2.2 m/s; Average velocity = 17.1 m/s
- Average speed = 2.2 m/s; Average velocity = 1.7 m/s
- Average speed = 1.4 m/s; Average velocity = 1.0 m/s
- Average speed = 14 m/s; Average velocity = 10 m/s
Correct Answer: B
2. A car moves by 30 km due North for 30 minutes, then it moves by 80 km due East for 1 hour and finally it moves by 70 km due South for 1.5 hours. What are the magnitudes of average speed (< v >) and average velocity (< v⃗ >) of the car during the entire trip?
- Average speed = 60 km/h; Average velocity = 29.8 m/s
- Average speed = 180 km/h; Average velocity = 89.4 km/h
- Average speed = 60 km/h; Average velocity = 29.8 km/h
- Average speed = 180 m/s; Average velocity = 89.4 m/s
Correct Answer: C
3. An object moves from E to C and then from C to G as shown in the figure.
What are the magnitudes of average speed (< v >) and average velocity (< v⃗ >) of the object during the entire motion if the moving time from E to G is 5 s?
- Average speed = 2.8 m/s; Average velocity = 1.9 m/s
- Average speed = 3.4 m/s; Average velocity = 1.9 m/s
- Average speed = 2.7 m/s; Average velocity = 1.8 m/s
- Average speed = 3.4 m/s; Average velocity = 2.8 m/s
Correct Answer: A
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- Continuing learning kinematics - read our next physics tutorial: The Meaning of Acceleration. Constant and Non-Constant Acceleration. Gravitational Acceleration
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