1. A mountain climber drops a rock off of a 70 m tall cliff. How long does the rock take to hit the ground below? How fast is it going at impact? 2. At a graduation ceremony, an excited graduate throws his cap into the air at a velocity of 18 m/s. What maximum height above his hand does it reach? How much time does it take to reach this height 3. A flowerpot falls from a windowsill 35.0 m above the sidewalk. a. How fast is the flowerpot moving when it strikes the ground? b. How much time does a passerby on the sidewalk below have to move out of the way before the flowerpot hits the ground? 4. A tennis ball is thrown vertically upward with an initial velocity of 14.0 m/s. a. What will the ball's speed when it returns to its starting point? b. How long will the ball take to reach its starting point