Acceleration as a function of velocity example

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Dynamics Tutorial: Acceleration as a function of velocity example

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Hey,
How did you split -0.005v^2 into only v^2? At 0:56 and 0:57.
Thanks!

trinatripathi
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Okay, maybe you can help me out solving this problem:

A steel ball is released from rest in a
container of oil. Its downward acceleration is a = 2. 4 − 0.6v in/s^2
where v is the ball’s velocity in in/s. What is
the ball’s downward velocity 2 s after it is released?

I worked out the problem and got v = 3.498 in/s but the real answer is 2.795 in/s. I am fairly certain my steps are correct, but there is something I'm apparently missing.

Help would be much appreciated.

hellbreaker
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Wow. Amazing that I went from head scratching to finding it easy. Fuck online lectures but thank you youtube.
What a world.

josesammut
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Excellent video, I finally understand

olivermilner
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Thank you man! this helped me so much :D

TheRockaleo
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Hello sir, will these lectures help in university level dynamics too?
Thank you in advance!

Neoduo
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What if it slows down to 0? the equation would kinda fall apart, wouldn't it?

zihongezrali
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Wow cool video, i hope sth like that is in my exam now that i got it xd. Thanks!

alexrosellverges
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Very sexy video. 10 outa 10. Helped alot.

noahlape