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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 ?
 one year ago
 one year 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 ?
 one year ago
 one year ago

This Question is Closed

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

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

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

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

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