Posted by **Jonathan** on Friday, September 27, 2013 at 10:02pm.

The position of a toy locomotive moving on a straight track along the x-axis is given by the equation:

x=t^4-6t^2+9t

where x is in meters and t is in seconds. The net force on the locomotive is equal to zero when t is equal to

Answer in units of s.

- Physics -
**Henry**, Sunday, September 29, 2013 at 8:55pm
When t = 0, x = 0.

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