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1. A rock is thrown vertically with a speed of 18m/s from a high vantage point....

1. A rock is thrown vertically with a speed of 18m/s from a high vantage point. It has a speed of 25m/s when it hits the ground. Calculate the height at which it was initially thrown.

2. A baseball comes off the bat at some angle above horizontal at an initial speed of 38m/s. Calculate its speed when it is 16m higher than the bat.

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