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What is the angular momentum of a 0.730 kg ball rotating on the end of a thin string in a circle of radius 0.950 m at an angular speed of 14.7 rad per second?
Wiki User
∙ 12y ago
the angular momentum is given by:
.
L = mass (m) * velocity (v) * radius (r)
you have the mass and radius, so to calculate the velocity:
.
circumference = 2 * pi * r = 2 * 3.1416 * 0.95 = 5.969 metres
14.7 rad / sec = 2.3396 rev / sec
so velocity = circumference * rev / sec = 2.3396 * 5.969 = 13.965 metres / sec.
so:
.
L = m * v * r = 0.73 * 13.965 * 0.95 = 9.685 n-m-s
Wiki User
∙ 12y ago
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