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**1. Homework Statement**

A car is stopped at a traffic light. It then travels along a straight road so that its distance from the light is given by x(t) = bt^2 - ct^3, where b = 2.40 m/s^2 and c = 0.100 m/s^3.

1. Calculate the average velocity of the car for the time interval t = 0 to t = 10.0 s.

2. Calculate the instantaneous velocity of the car at t=0s.

3. Calculate the instantaneous velocity of the car at t=5.00 s.

4. Calculate the instantaneous velocity of the car at t=10.0 s.

5. How long after starting from rest is the car again at rest?

**2. Homework Equations**

x

_{2}-

_{1}/t

_{2}-t

_{1}

**3. The Attempt at a Solution**

1. I was wondering what the x-values were since I think change in time is just x

_{2}-x

_{1}/10.0 seconds.

2,3,and 4, do I just plug t into the equation bt^2 - ct^3?

5. No idea.