(a)A rock is launched from the ground into the air. After 3 seconds the rock is observed to have a speed of 24.0 m/s at
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(a)A rock is launched from the ground into the air. After 3 seconds the rock is observed to have a speed of 24.0 m/s at
(a)A rock is launched from the ground into the air. After 3 seconds the rock is observed to have a speed of 24.0 m/s at an angle +18.0° below horizontal. Neglecting air resistance, with what velocity was the rock launched?
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