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An Ostrich is being chased by a cheetah. the ostrich is running at 44 feet per second and the cheetah is running at 110 feet per second. if the two started at the same place and the ostrich got a 60 second head start, how many seconds will it be before the cheetah catches it

 Jan 15, 2020
 #1
avatar+109739 
+2

In 60 seconds, the ostrich will run  60*44   = 2640 ft

 

And let  S  be the number of seconds that it will take the cheetah to catch the ostrich

 

So....the distance that  the ostrich will cover before being caught  is  2640 + 44S

 

So....we need to solve this

 

110S  = 2640 + 44S        subtract  44S from both sides

 

66S  =  2640      divide both sides by 66

 

S = 40 seconds     

 

cool cool cool    

 Jan 15, 2020
 #2
avatar+22108 
+3

The ostrich gets a 44f/s x 60s =  2640 ft head start

the cheetah is running   110 - 44   66 f/s faster

    to cover the 2640 ft   the cheetah will need       2640 ft/66f/s = 40 seconds to catch the ostrich

 Jan 15, 2020
 #3
avatar+11729 
+2

That's how you write in physics.

laugh

 Jan 15, 2020

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