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23 Nov 2019

A wheel on a game show is given an initial angular speed of 1.31rad/s. It comes to rest after rotating through 3/4 of a turn.

(a) Find the average torque exerted on the wheel given that it is adisk of radius 0.79 m and mass 6.4 kg.

(b) If the mass of the wheel is halved and its radius is doubled,will the angle through which it rotates before coming to restincrease, decrease, or stay the same?
2
increase
decrease
stay the same

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Irving Heathcote
Irving HeathcoteLv2
13 Mar 2019

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

please give answers and explain thank you.

A wheel on a game show is given an initial angular speed of 1.15rad/s. It comes to rest after rotating through 3/4 of a turn.
(a) Find the average torque exerted on the wheel given that it is adisk of radius 0.79 m and mass 6.4 kg.
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(b) If the mass of the wheel is halved and its radius is doubled,will the angle through which it rotates before coming to restincrease, decrease, or stay the same?
increase
decrease
stay the same

Explain. (Assume that the average torque is unchanged.)

A solid wheel on a game show is given an initial counterclockwiseangular velocity of +1.12 rad/s. It comes to rest after rotatingthrough 3/4 of a turn.

(a) Find the torque (vector) exerted on the wheel given that it isa disk of radius 0.76 m and mass 6.4 kg.


(b) Assuming that the torque is unchanged, but the mass of thewheel is halved and its radius is doubled. How will this affect theangle through which it rotates before coming to rest? (Make sureyou understand the reasoning.)

A grinding wheel is in the form of a uniform solid disk of radius7.00 cm and mass 2.00 kg. It starts from rest and acceleratesuniformly under the action of the constant torque of 0.600 Nm thatthe motor exerts on the wheel. (a) How long does the wheel take toreach its final operating speed of 1 200 rev/min?

2. A disk 8.00 cm in radius rotates at a constant rate of 1 200rev/min about its central axis. Determine the tangential speed at apoint 3.00 cm from its center.

3.A wheel starts from rest and rotates with constant angularacceleration to reach an angular speed of 12.0 rad/s in 3.00 s.Find the angle through which it rotates in this time .

4.A grinding wheel is in the form of a uniform solid disk of radius7.00 cm and mass 2.00 kg. It starts from rest and acceleratesuniformly under the action of the constant torque of 0.600 Nm thatthe motor exerts on the wheel. (a) How long does the wheel take toreach its final operating speed of 1 200 rev/min?

5. A cylinder of mass 10.0 kg rolls without slipping on ahorizontal surface. At a certain instant its center of mass has aspeed of 10.0 m/s. Determine its total energy

6.A horizontal 800-N merry-go-round is a solid disk of radius 1.50m, started from rest by a constant horizontal force of 50.0 Napplied tangentially to the edge of the disk. Find the kineticenergy of the disk after 3.00 s

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