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How can I solve this? 8. You throw a basketball from a height of 1.8 m above the ground with an initial velocity of 2.5

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8. You throw a basketball from a height of 1.8 m above the ground with an initial velocity of 2.5 m/s [ 30 degrees above the horizontal]. What is the magnitude of its velocity when it just touches the ground? Neglecting friction, use the conservation of energy theorem. [4A] 9. A roller coaster starts from rest at point A. Neglecting friction, calculate the speed at points B. [4T]

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