A rock is tossed straight up from the ground with a speed of 21 m/s . When it returns, it falls into a hole 10 m deep. You may want to review (Page) . For help with math skills, you may want to review: Quadratic Equations For general problem-solving tips and strategies for this topic, you may want to view a Video Tutor Solution of Time in the air for a tossed ball. Part A What is the rock's velocity as it hits the bottom of the hole