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maparicio
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If a car moving at 72.0 takes 300 to stop with uniform acceleration after its brakes are applied, how far will it take to stop under the same conditions if its initial velocity is 36.0 ?
 2 years ago
 2 years ago
maparicio Group Title
If a car moving at 72.0 takes 300 to stop with uniform acceleration after its brakes are applied, how far will it take to stop under the same conditions if its initial velocity is 36.0 ?
 2 years ago
 2 years ago

This Question is Closed

maparicio Group TitleBest ResponseYou've already chosen the best response.0
i got it wrong
 2 years ago

maparicio Group TitleBest ResponseYou've already chosen the best response.0
These are my choices 15.0 37.5 75.0 150
 2 years ago

3psilon Group TitleBest ResponseYou've already chosen the best response.0
But it isn't 150?
 2 years ago

maparicio Group TitleBest ResponseYou've already chosen the best response.0
no i got it wrong
 2 years ago

etemplin Group TitleBest ResponseYou've already chosen the best response.2
first, you need to find out how much acceleration (but slowing down, not going faster, so it will be negative) the car has. do this by using the equation vf^2 = vi^2 + 2ax. substitute in what you already know to find the acceleration. vf=0, vi=72, x=300. then use the same equation after solving for "a" to find x. set vf = 0, vi = 36, a = "a" from previous, and solve for x
 2 years ago

etemplin Group TitleBest ResponseYou've already chosen the best response.2
hint: a = 8.64 from solving the first equation. put it into the second equation to get x = 75
 2 years ago

maparicio Group TitleBest ResponseYou've already chosen the best response.0
ok thanks
 2 years ago
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