The cheetah is considered the fastest running animal in the world. cheetahs can accelerate to a speed of 21.7 m/s in 2.50 s and can continue to accelerate to reach a top speed of 28.7 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 mi/h. (express your answer to three significant figures.) 2) starting from a crouched position, how long does it take a cheetah to reach its top speed? (express your answer to three significant figures.) 3) how far does it travel in that time? (express your answer to three significant figures.) 4) if a cheetah sees a rabbit 120 m away, how long will it take to reach the rabbit, assuming the rabbit does not move? (express your answer to three significant figures.)

1) 64.2 mi/h

2) 3.31 seconds

3) 47.5 m

4) 5.26 seconds

Explanation:

t = Time taken = 2.5 s

u = Initial velocity = 0 m/s

v = Final velocity = 21.7 m/s

s = Displacement

a = Acceleration

1) Top speed = 28.7 m/s

1 mile = 1609.344 m

1 hour = 60×60 seconds

Top speed of the cheetah is 64.2 mi/h

Equation of motion

Acceleration of the cheetah is 8.68 m/s²

2)

It takes a cheetah 3.31 seconds to reach its top speed.

3)

It travels 47.5 m in that time

4) When s = 120 m

The time it takes the cheetah to reach a rabbit is 120 m is 5.26 seconds

the answer is d. 4

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