a particles position on the x axis is given by the function x=(t^2 -4t +2)m where t is is in s. where is the particle when v=4.0 (m/s)????

Question

chrisplusian · Answer

I took the derivative of the function and got 2t-4 for the velocity function. Then i set that equal to 4 and solved. It gave me t=4. I plugged that back into the position function and got x=10 m. but that was wrong. what am I doing wrong?

anonymous · Answer

x=2 m

anonymous · Answer

You did it correct,

noelgreco · Answer

Your calculation was wrong when you plugged the 4 back in to the position equation.

chrisplusian · Answer

YOU ARE RIGHT. I JUST SAW THAT I GOT 8 WHEN I  MULTIPLIED 4X4 LOL

noelgreco · Answer

Happens to me all the time.