The cheetah is the fastest land animal in the world. It can accelerate from rest to 20 m sin 2 s. and has a top speed of about 30 ms, although it can only maintain it for about 450 m before it has to stop to rest In contrast, an antelope can run at around 22 m s¹for long periods. (a) What is the cheetah's average speed between rest and 20 m s1 (b) Assume that the cheetah accelerates up to its top speed with the acceleration in your answer to (a) () How far will the cheetah travel while it accelerates from rest to its top speed? (i) How long this acceleration take? (c) If the cheetah continues at top speed, how long will it be before it has to stop to rest? (d) For how long can a cheetah run, starting from rest? (e) If an antelope starts from rest and accelerates to its top speed at the same time as a cheetah, how far will it travel in the time obtained in your answer to (d)?
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The cheetah is the fastest land animal in the world. It can accelerate from rest to 20 m s–1 in 2 s, and has a top speed of about 30 m s–1 although it can only maintain this for a distance of about 450 m before it has to stop to rest. In contrast, an antelope can run at around 22 m s–1 for long periods.
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