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Aneli [31]
4 years ago
8

A car takes 10 s to go from v = 0 m/s to v = 25 m/s at constant acceleration. If you wish to find the distance traveled using th

e equation d = 1/2at2 , what value should you use for a?
need to show all work
Physics
1 answer:
german4 years ago
5 0

Initial velocity (u) = 0 m/s

Final velocity (v) = 25 m/s

time taken (t) = 10s

acceleration (a) = ?

Now,

Acceleration is rate of change of velocity, so formula is

a = (v - u)/t

a = (25 - 10)/10

a = 15/10

a = 1.5 m/(s^2)

Use this value of a.

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Here's the rule you need to know
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Got that ?

Now you could set up a proportion:

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Cross-multiply the proportion:

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Divide each side by (30°) :    Period = (360° · 0.01 sec) / (30°)

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                                                     =  (3.6 / 30)  sec

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Another way to look at it:

30°        takes    0.01 second
60°        takes    0.02 second
90°        takes    0.03 second
120°      takes    0.04 second
150°      takes    0.05 second
180°      takes    0.06 second
210°      takes    0.07 second
240°      takes    0.08 second
270°      takes    0.09 second
300°      takes    0.10 second
330°      takes    0.11 second
360°      takes   0.12 second

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