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A rock is tossed straight up from ground level with a speed of 25 m/s. When...

A rock is tossed straight up from ground level with a speed of 25 m/s. When it returns, it falls into a hole 25 m deep. (a) What is the rock's velocity just before it hits the bottom of the hole? (b) How long is the rock in the air, from the instant it is released until it hits the bottom of the hole? (c) What is the total distance travelled by the rock from the point of throw to the point where it hits the bottom of the hole?
(d) Sketch (i) position verses time graph, (ii) velocity verses time graph, (iii) acceleration verses time graph, on the provided graph.
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