You push a disk-shaped platform on its edge 2.0 m from the axle. The platform starts at rest and has a rotational acceleration of 0.30 rad/s2
You push a disk-shaped platform on its edge 2.0 m from the axle. The platform starts...
A carnival merry-go-round has a large disk-shaped platform of mass 120 kg that can rotate about a center axle. A 60- kg student stands at rest at the edge of the platform 4.0 m from its center. The platform is also at rest. The student starts running clockwise around the edge of the platform and attains a speed of 2.4 m/s relative to the ground. A) Determine the rotational velocity of the platform. B) Determine the change of kinetic energy...
A horizontal platform in the shape of a circular disk rotates on
a frictionless bearing about a vertical axle through the center of
the disk. The platform has a radius of 4.64 m and a rotational
inertia of 141 kg·m2 about the axis of rotation. A 53.2
kg student walks slowly from the rim of the platform toward the
center. If the angular speed of the system is 1.48 rad/s when the
student starts at the rim, what is the...
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center of the disk. The platform has a radius of 3.77 m and a rotational inertia of 200 kg·m2 about the axis of rotation. A 68.3 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.28 rad/s when the student starts at the rim, what is the...
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center of the disk. The platform has a radius of 3.09 m and a rotational inertia of 445 kg·m2 about the axis of rotation. A 68.5 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 2.42 rad/s when the student starts at the rim, what is the...
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center of the disk. The platform has a mass of 114.0 kg, a radius of 3.80 m, and a rotational inertia of 1.65×103kgm2 about the axis of rotation. A student of mass 57.0 kg walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.89 rad/s when the student starts...
A disk starts spinning from rest at t=0, with a constant angular acceleration of 1.2 rad/s2. The radius of the disk is 0.4 m. Consider a bug clinging to the outer edge of the disk. What is the magnitude of the acceleration felt by this bug at t=1 s? Choose the closest answer.
A horizontal platform in the shape of a circular disk rotates on a frictionless bearing about a vertical axle through the center of the disk. The platform has a radius of 3.40 m and a rotational inertia of 464 kg·m2 about the axis of rotation. A 68.9 kg student walks slowly from the rim of the platform toward the center. If the angular speed of the system is 1.48 rad/s when the student starts at the rim, what is the...
A wheel of moment of inertia of 3.00 kg.m2 starts from rest and accelerates under a constant torque of 3.00 N.m for 4.00 s. The wheel's rotational kinetic energy at the end of 4.00 s is = A wheel starts at rest, and has an angular acceleration of 4 rad/s2. After 4.0 s it will have an angular velocity of ? rad/s A wheel starts at rest, and has an angular acceleration of 3.5 rad/s2. After 2.0 s it will have...
A merry-go-round modeled as a disk of mass 100 kg and radius 2.0 m is rotating around a frictionless vertical axle. After a person of mass 60 kg jumps onto the merry-go-round, the system’s angular speed decreases to 2.0 rad/s. If the person walks slowly from the edge toward the center, find the change in the system’s rotational kinetic energy caused by her movement to 0.5 m from the center.
A 0.30 m radius automobile tire accelerates from rest at a constant 2.0 rad/ss. What is the centripetal acceleration of a point on the outer edge of the tire after 5.0 s? 30 m/s2 is the correct answer.