Question

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)????

Answer 1

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?

Answer 2

x=2 m

Answer 3

You did it correct,

Answer 4

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

Answer 5

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

Answer 6

Happens to me all the time.