If a rock is thrown upward on the planet Mercury with a velocity of [math] its height after [math] seconds is given by the equation [math]


1. Find the velocity of the rock after one second.
Velocity (in m/s):

2. Find the velocity of the rock when [math]
Velocity (in m/s): [math]

3. When will the rock hit the surface?
Time (in sec): [math]

4. With what velocity will the rock hit the surface?
Velocity (in m/s):