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Average Speed

What is the a...

Question

What is the average speed of a Cheetah that sprints $100 m$ in $4 s e c .$ ? What if it sprints $50 m$ in $2 s e c$ ?

25 m / s

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20 m / s

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45 m / s

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55 m / s

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Solution

The correct option is A $25 m / s$
$s_{1} = 100 m, s_{2} = 50 m, t_{1} = 4 s, t_{2} = 2 s$
Average velocity $= \frac{s_{1} + s_{2}}{t_{1} + t_{2}} = \frac{100 + 50}{4 + 2} = \frac{150}{6} = 25 m / s$

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