Phy U2Q3

What's a vector and what's a scalar?

Groups:

(a) Vector

,

(b) Scalar

• Mass

• Acceleration

• Distance

• Velocity

• Time

• Displacement

• Speed

• Force of a punch

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2.1

What's the magnitude of the displacement of a man who walked 10. m east, 5.0 m north, and 2.0 m west?

• 11 m

• 89 m

• 9.5 m

• 13 m

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2.2

A bird flies with an average velocity of 149 km/h East for 2.0 h. Then the bird turns around and flies at an average velocity of 110 km/h West for 3.0 h. What's the bird's displacement after the entire flight?

• 32 km West

• 64 km West

• 550 km East

• 630 km East

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2.2

What is the distance traveled by a man who walked 10 m east, 5 m north, and 2 m west?

• 15 m

• 17 m

• 9.5 m

• 13 m

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2.2

You get on at the bottom of a ferris wheel with the diameter of 60.0 meters.  What distance have you traveled when you reach the top of the ferris wheel on your first rotation?

• 188 m

• 1,414 m

• 94.2 m

• 60.0 m

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2.2

When is the object stationary?

• 0-10 seconds

• 10-15 seconds

• 15-40 seconds

• 40-60 seconds

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2.3

Which of these position vs. time graphs shows an object changing direction?

• 
• 
• 
• 

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2.3

According to the graph, what was the velocity for the first 5 seconds?

• 1 m/s

• 0.5 m/s

• 5 m/s

• 2 m/s

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2.3

What is the displacement for the whole trip?

• 1 meter

• -1 meter

• 0 meters

• 3 meters

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2.3

Ethan and Zoey are riding bicycles side by side in the same direction. Both bicycles accelerate at a uniform rate of 2 m/s². After riding for 4 seconds, what is Ethan's speed relative to Zoey?

• 0 m/s

• 2 m/s

• 6 m/s

• 8 m/s

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2.4