A speeding car has instantenous velocity of 1 m/s when a stopwatch reads 10 seconds. It has constant acceleration of 2 m/s^2.
What is the cars speed when it reaches the stopwatch reads 12 seconds.
x= (Vinitial)(DeltaT) + 1/2(a09deltaT)^2
I think this is the right equation for constant acceleration...
The Attempt at a Solution
(1.0m/s)(2seconds) + 1/2(2m/s/s)(2)^2
2 + 4
= 6 m/s
This is a problem in my textbook, and the answer they give is 5 m/s. Am i using the wron equation? Or what am i doing wrong?