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A dragster runs the 1/4 mile in 8.96s. What is the cars velocity at the finish...

A dragster runs the 1/4 mile in 8.96s. What is the cars velocity at the finish line?
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Answer #1

I get 257 miles per hour.

x - xₒ = t(vₒ + v)/2

Solve for v: xₒ (initial position) and vₒ (initial velocity) are both zero so x = vt/2

Cross multiply: v = 2x/t

Plug in known values: v = 2(0.25miles)/8.96 sec

Solve for v: v = 0.05580 miles/sec

Convert miles/sec to MPH:
(0.05580miles/sec) x (60sec/min) x(60min/hour) = 200.1 MPH

I don't know what units your teacer wanted, but it could be ft/sec, instead of MPH:
200.1MPH = 294.71 ft/sec .

Hope this will helps you.

please thumbs up?.

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