Part 1 Melissa uses a slingshot to fire a stone straight up at 24 m/s

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Part 1 Melissa uses a slingshot to fire a stone straight up at 24 m/s.

a) What is the stone's velocity 3.0 s later?

b) What is the displacement 3.0 s after it was fired?

Part 2 Jason throws a baseball into a deep well at 4.0 m/s [down]. If it hits the water in 2.0s,

a) How far below the ground is the water's surface?

b) What is the ball's average velocity?

c) How soon after it is thrown does the ball actually acquire the velocity calculated (b)?

d) What is the velocity of ball when it hits the water?