
timeperiod of second hand of clock is T = 60 s
moment of inertia of second hand about axis passing through center and perpendicular to the face of clock is I = 1/3(M.L2)
#3 Find the magnitude of the angular momentum of the second hand on a clock about...
1. What is the angular momentum of a 0.240-kg ball rotating on the end of a thin string in a circle of radius 1.35 m at an angular speed of 15.0 rad/s ? 2. A diver can reduce her moment of inertia by a factor of about 4.0 when changing from the straight position to the tuck position. If she makes 2.0 rotations in 1.5 s when in the tuck position, what is her angular speed (rev/s) when in the...
A thin uniform rod (mass= 4.0 kg, length= 120.cm) rotates about an axis that is perpendicular to the rod; the axis intersects the rod at 1/3 of the rod's length. The rod rotates about the axis at the rate of 8 full revolutions per second. a. Compute the rotational Inertia of the rod based on the given axis of rotation. b. Compute the magnitude of the angular velocity in radians per second c. Compute the tangential speed of the end...
Two uniform rods of identical mass and identical length are rotating with identical rotational kinetic energy. The first rod is rotating about and axis that passes through its left end and points perpendicular to the rod. The second rod is rotating about an axis that passes through its center and points perpendicular to the rod. Which rod has a larger magnitude of angular velocity? a. They both have the same magnitude of angular velocity. b. The second rod. c. The...
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Part I Angular Momentum 1. Find the angular momentum of a rectangular box (dimensions X XY) rotating about its center of mass (mass m). Assume the box has angular velocity w and the center of mass is located at the origin. If the rotation axis changes to the point (x, y) away from the center of mass how would the angular momentum change?
Part I Angular Momentum 1. Find the angular momentum of a rectangular...
What is the magnitude of the angular momentum of a 900 g, 2.0 m long bar rotating at 200 rpm about an axis through its center? Assume the bar is thin.
In a long jump, an athlete leaves the ground with an initial angular momentum that tends to rotate her body forward, threatening to ruin her landing. To counter this tendency, she rotates her outstretched arms to "take up" the angular momentum (see the figure below). In 0.650 s, one arm sweeps through 0.500 rev and the other arm sweeps through 1.000 rev. Treat each arm as a thin rod of mass 3.9 kg and length 0.59 m, rotating around one...
In a long jump, an athlete leaves the ground with an initial angular momentum that tends to rotate her body forward, threatening to ruin her landing. To counter this tendency, she rotates her outstretched arms to "take up" the angular momentum (see the figure below). In 0.730 s, one arm sweeps through 0.500 rev and the other arm sweeps through 1.000 rev. Treat each arm as a thin rod of mass 3.9 kg and length 0.56 m, rotating around one...
What is the magnitude of the angular momentum (in kgm2/s) of a 880 g ball flying through the air and spinning at 154 rpm after having been hit? The ball can be modelled as a spherical shell rotating about its center with a radius of 198 cm.
What is the magnitude of the angular momentum (in kgm2/s) of a 654 g ball flying through the air and spinning at 110 rpm after having been hit? The ball can be modelled as a spherical shell rotating about its center with a radius of 116 cm.
2: Angular Momentum and Energy of a Rotating Spinning Wheel The 15-kg circular disk spins about its axle with a constant angular velocity of w 10rad/s. Simultaneously, the yoke is rotating with a constant angular velocity of 5rad/s. Determine the angular momentum of the disk about its center of mass O, and its kinetic energy. 5o mm