As part of a child's game, a girl swings a ball on the end of a...
As part of a child's game, a girl swings a ball on the end of a string in a horizontal circle with constant speed, as shown in (Figure 1). The string is 0.3m long and makes an angle of 35∘ with the vertical during the game, and the mass of the ball is 100g.
What is the speed of the ball?
During half a revolution, what is the work done by gravity and tension on the ball?
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