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An object is thrown downward with an initial speed of 10 ms-1 from a height of 40 m above the ground. At the same instant, a second object is propelled vertically upward from ground level with a speed of 20 ms-1.
1. How long after they begin moving does this occur?
2. What maximum height does the object thrown upwards reach?
3. At what height above the ground will the two objects pass each other?
4. Represent the shapes of the velocity versus time graphs for both objects. Draw both shapes on the same axes, and indicate where time and velocity are zero.
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