A toy car coasts uphill at 2.34 m/s. It accelerates at -.34 m/s squared. How long will it take the car to stop.What equation would I use.

Answer 1

Vo = a * T
where a = 0.34 m/s^2 and Vo = 2.34 m/s
That is how long it takes to reach a velocity of zero.
(Ignore the minus sign on a)
Solve for T

Answer 2

t=(Vfinal - Vintial)/ acceleration
time= (0-2.34m/s)/ -.34m/s^2
time=6.88seconds