A circular disc of moment of ertia 20 kg-m is rotated about its transverse symmetry axis at a constant frequency of 90 rpm by electric motor having power 31.42 watts. When motor gets switch off how many rotations does it completes before coming to rest ?

Q: Two wheels of moment of inertia 2.0 kg m and 1.0 kg.m are set in rotation with angular speed 6.4…

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Q: A 4 kg object rotates at 30 rpm about a fixed axis through its center of mass. What is the total…

A: Given:-  The object of mass  m = 4 kg  The object rotated with the speed of 30 rpm  about a fixed…

Q: The record player is shut off and the phonograph record decelerates uniformly from 33.33 rpm to a…

A: The initial angular velocity of the record, ωi=33.33 rev/min   The final angular velocity of the…

Q: So given a problem, Determine the moment of a 20-lb force about the point O. (a) apply the…

A: (a) Determine the distance OD using Pythagoras theorem. Determine the moment at point O using the…

Q: Two uniform thin identical rods each of mass 15 g and length 30 cm are joined so as to form a cross…

A: Angular momentum of a rigid body about a point, which has translational as well as rotational motion…

Q: A force P passing through points A and B in the figure has a clockwise moment of 450 ft-lb about O.…

A: Given: Torque,τ=450 ft-lb The product of force and perpendicular distance from the direction of…

Q: A 21 mm diameter glass marble with a mass of 25 g rolls without slipping down a track toward a…

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Q: A thin-walled, hollow spherical shell of mass m and radius r starts from rest and rolls without…

A: I=2/3Mr²

Q: 51. B SSM A flywheel is a solid disk that rotates about an axis that is perpendicular to the disk at…

A: Given data- mass of flywheel (solid disk) m=13 kg radius of flywheel r=0.30 m rotational kinetic…

Q: II. A ball with mass 1.00 kg slides down from a rump smoothly (pure rotating) then go p needed that…

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Q: Given: tritium activity in a 100 kg body = 3.57 X 10^18 Bq Write out the radioactive decay equation…

A: Tritium is one of the two isotopes of Hydrogen with another being deuterium. It has two and a proton…

Q: (a) Calculate the rotational kinetic energy of Earth on its axis. (b) What is the rotational kinetic…

A: We have to find The rotational energy of earth around it's own axis  The rotational energy of earth…

Q: The net torque for the rod for which rotational axis shown is: 1N 9N 2N

A: Given Data : The total mechanical energy of the satellite is given as Em=-3.52×107 J The kinetic…

Q: A 1.50 kg hoop of radius 0.160 m is released from rest at point A in the figure below, Its center of…

A: a) at           VB = RWB              (No slipping) applying law or conservation of energy in…

Q: How much rotational kinetic energy in joules is there in a disk  of radius 0.2 meters and mass 76 kg…

A: Given,    r = 0.2 m   m = 76 kg  turns = 1000/s          = 1000×3600×π180 = 6285.713 rad/s

Q: What is the kinetic energy of a 123 cm long thin uniform rod with a mass of 458 g that is rotating…

A: The rod is rotating about its center of mass so it has only rotational kinetic energy.  Kinetic…

Q: A primitive yo-yo has a massless string wrapped around a solid cylinder with mass M and radius R.…

A: To solve this problem using energy considerations, we'll equate the loss in gravitational potential…

Q: Suppose a 175 kg motorcycle is heading toward a hill at a speed of 34 m/s. The two wheels weigh 12…

A: The objective of the question is to find out how high the motorcycle can coast up the hill without…

Q: A block of 50 kg is attached to a cable. The cable is then attached to a rotating assembly with a…

A: Part 3:To calculate the work done by the weight of the 50-kg block after the rotating assembly has…

Q: a flat circular frisbee of mass 2.26 and radius .669 meters is thrown in such a way that the speed…

A: Given: mass m = 2.26 kg radius R = 0.669 m velocity v = 0.838 m/s frequency   ω=21.7 rot/min =…

Q: The angular velocity of a pulley of mass m and radius R changes with time w(t) = 60e-0.02t (rad/s).…

A: Given: The angular velocity isωt=60e-0.02t rads The expression fir angle rotated is:…

Q: A 3.5-inch floppy disk in a computer rotateswith a period of 2.00 * 10-1s. What are (a) the angular…

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Q: A thin-walled, hollow spherical shell of mass m and radius r starts from rest and rolls without…

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Q: Two wheels of moment of inertia 9.9 kg.m and 4.6 kg.m are set in rotation with angular speed 5.1…

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Q: A coin rolls on a horizontal plane. What fraction of its total kinetc energy is rotational?

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Q: o bod.ods of halqcs A constant torque of 500 N•m is applied to a small windmill on a miniature golf…

A: Recall P=FV  for translational velocity P=τω for rotational velocity

Q: A thin, 90.0 g disk with a diameter of 6.00 cm rotates about an axis through its center with 0.240 J…

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Q: How much rotational kinetic energy in joules is there in a disk  of radius 0.2 meters and mass 33 kg…

A: The equation for the rotational kinetic energy is, K.E.=12Iω2 Here, I is the moment of inertia, ω is…

Q: 3. (a) Calculate be the speed of a ring of mass M and radius Ro when it reaches the bottom of an…

A: Apologies. We only answer one question at a time. we will answer the first one as the exact one…