What is the velocity after parachute opens?

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The discussion centers on calculating the velocity of a drag racer after a parachute opens, following an initial acceleration phase. The racer accelerates from rest at +23.0 m/s² over a distance of 402 m, reaching a speed of 95.4 m/s before the parachute deploys. After the parachute opens, the car decelerates at -6.70 m/s² over a distance of 335 m (3.35 x 10² m). The final velocity after this deceleration is determined to be approximately 72.4 m/s.

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hi,

i am having trouble with figuring out this problem.

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +23.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.70 m/s2. How fast is the racer moving 3.35 102 m after the parachute opens?

I have no clue where to start or what to do. please help!

thanks,

Z
 
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deuceszbigz said:
hi,

i am having trouble with figuring out this problem.

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +23.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -6.70 m/s2. How fast is the racer moving 3.35 102 m after the parachute opens?

I have no clue where to start or what to do. please help!

thanks,

Z

Find the speed the moment the parachute opens. From that you can answer the question... What exactly is the question though... "How fast is the racer moving 3.35 102 m after the parachute opens?"

is it 3.35m or 102m?
 
i mis-typed. it is supposed to be 3.35*10^2
 

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