A small ball hangs on a string with the length of 0.5 meters. The ball is misplaced from its equilibrium position so that the string makes 5º angle with the vertical. At time t = 0, the ball is released. What angle will the string make with the vertical at the time t = 0.25 s? Assume the air resistance is negligible and the gravitational acceleration is 9.8m/s 2
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