A person standing at the edge of a cliff 30 m high throws one baseball upwards at 20 m/s and then another baseball downwards at 20 m/s such that both baseballs land at the base of the cliff at exactly the same time. How will the speeds of the two balls compare at the moment of impact (assuming air resistance is negligible)?

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A person standing at the edge of a cliff 30 m high throws one baseball upwards at 20 m/s and then another baseball downwards at 20 m/s such that both baseballs land at the base of the cliff at exactly the same time. How will the speeds of the two balls compare at the moment of impact (assuming air resistance is negligible)?