Cheetahs can accelerate to a speed of 20 m/s in 2.5 s and can continue to accele

Question

Cheetahs can accelerate to a speed of 20 m/s in 2.5 s and can continue to accelerate to reach a top speed of 29 m/s. Assume the acceleration is constant until the top speed is reached and is zero thereafter.

1) Express the cheetah's top speed in miles per hour.

2) Starting from a crouched position, how long does it take a cheetah to reach its top speed and how far does it travel in that time?

3) If a cheetah sees a warthog 120 m away, how long will it take to reach lunch assuming the warthog does not move?

Explanation / Answer

a)29 m/s=64.87 miles /hr

b)20=a*2.5 so a=8 so 29=8*t

so t=3.625 sec

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