Barker Craig
03/05/2023 · Elementary School

1. A 0.500 g (small) mass on the end of a 1.70 m long string is pulled aside \( 20^{\circ} \) from the vertical and shoved downward (toward the bottom of its motion) with a speed of \( 2.4 \mathrm{~m} / \mathrm{s} \). (a) Is the angle on the other side greater than, less than, or the same as the angle on the initial side \( \left(20^{\circ}\right) \) ? Explain in terms of energy. (5pts) (b) Calculate the angle it goes to on the other side, neglecting air resistance. ( 10 pts )

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(a) 另一侧的角度大于初始侧的角度 \(20^{\circ}\)。 (b) 摆球在另一侧的角度约为 \(48.5^{\circ}\)。

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