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a ho for a the e student moves her hand out 70. A rock is tossed straight up with a speed of 20 m/s. When it a. What is the rocks velocity as it hits the bottom of the hole? assumptions: The man a runs at a constant speed continues accelerating fo speed. A man and a hor man is given a 100 m he finish line. How much returns, it falls into a hole 10 m deep. b. How long is the rock in the air, from the instant it is released until it hits the bottom of the hole? 71. Iilln springboard divin-th

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70a)Using the kinematics equation -(20) +2(-9.8) -10) -24.41 m/s =-24.4 m/s Negative sign indicates the direction is downward b) Again using the kinematics equation 20-(-24.1) 9.8

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