1. You start off moving at 12 m/s, but then deccelerate at a rate of 4 m/s/s backwards for 2 seconds. How much distance do you cover in that time?

2. If you start off moving at 20 m/s and then cover a distance of 35 meters after 3 seconds, what is your acceleration?

3. You throw a pebble straight to the right (not up or down) at 10 m/s. It takes 5 seconds to hit the bottom of a cliff. How tall is the cliff?