If a 1500 car can accelerate from...
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If a 1500 car can accelerate from...

[From: ] [author: ] [Date: 12-10-19] [Hit: ]
And this would be true whether the distances were in leagues and the times in minutes,or if the distances were in cm and the time in milliseconds.-No units.No answer.......
If a 1500 car can accelerate from 30 to 50 in 3.5 , how long will it take to accelerate from 50 to 70 ? Assume the power stays the same, and neglect frictional losses.

THANKYOU!

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Although there are no units, ratios do not require units.
power = gain in energy / time
and energy is proportional to the square of the speeds.
time is then proportional to energy / power but other factors are constant
so time is proportional to the gain in v^2

hence T2/T1 = ( 70^2-50^2) / (50^2-30^2)
=1.5
i.e it takes 1.5 times longer in the second case ( 5.25 unspecified units)

And this would be true whether the distances were in leagues and the times in minutes,
or if the distances were in cm and the time in milliseconds.

-
No units.
No answer.
1
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