chris215
  • chris215
-
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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freckles
  • freckles
the car is at rest when the velocity is zero
chris215
  • chris215
I got 12.5
phi
  • phi
It looks like you need to first find the formula for the velocity by taking the derivative of distance with respect to time.

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phi
  • phi
start with s(t) = 50t - 2t^2, and ds/dt = 50 - 4t and you want the value of t when ds/dt (i.e. the velocity) is 0
anonymous
  • anonymous
12.5
chris215
  • chris215
so I solve for t?? I still get 12.5?
phi
  • phi
yes, you set velocity to 0: 0 = 50 - 4t add +4t to both sides 4t= 50 divide both sides by 4
chris215
  • chris215
ok thanks so much!!

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