An object travels North at $5 \frac{m}{s}$ $5 m/s$ for $3 s$ $3 s$ and then travels South at $1 \frac{m}{s}$ $1 m/s$ for $4 s$ $4 s$ . What are the object's average speed and velocity?

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An object travels North at $5 \frac{m}{s}$ $5 m/s$ for $3 s$ $3 s$ and then travels South at $1 \frac{m}{s}$ $1 m/s$ for $4 s$ $4 s$ . What are the object's average speed and velocity?

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Answer 1 · 2016-05-01T13:27:23

Average speed = $\frac{19}{7}$ $19/7$ m/s
Average velocity= $\frac{11}{7}$ $11/7$ m/s

Explanation:

The distance $= 5 \cdot 3 + 1 \cdot 4 = 19 m$ $=5*3+1*4=19m$
Averagr= $\frac{19}{3 + 4} = \frac{19}{7}$ $19/(3+4)=19/7$ m/s
The displacement $= 5 \cdot 3 - 1 \cdot 4 = 11 m$ $=5*3-1*4=11m$
Average velocity $= \frac{11}{3 + 4} = \frac{11}{7}$ $=11/(3+4)=11/7$ m/s

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An object travels North at $5 \frac{m}{s}$ $5 m/s$ for $3 s$ $3 s$ and then travels South at $1 \frac{m}{s}$ $1 m/s$ for $4 s$ $4 s$ . What are the object's average speed and velocity?

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An object travels North at 5ms 5 m/s for 3s3 s and then travels South at 1ms 1 m/s for 4s 4 s. What are the object's average speed and velocity?

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An object travels North at $5 \frac{m}{s}$ $5 m/s$ for $3 s$ $3 s$ and then travels South at $1 \frac{m}{s}$ $1 m/s$ for $4 s$ $4 s$ . What are the object's average speed and velocity?