A standard clothes hanger makes a pretty good equal arm balance. With nothing on it, the hanger hangs free with the bottom side horizontal.    (A) while hanging normally, where is the axis of rotation for this equal arm balance located? With respect to the axis, where is the center mass located?    (B) if you tip the hanger with your finger then release it, it swings back and forth until friction stops it in a horizontal position. Use the concept of torque to explain why the hanger starts to swing when you release it.

Q: Two masses with weights of 1N and 3N are hung to the two ends of a meter stick.  (a) Where should a…

A: Given. length of meter stick=1m W1=1N=weight hanging at one end W2=3N=weight hanging at other end

Q: A 36.8 kg child stands on a spinning platform that has been well maintained (neglect friction in the…

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Q: 3. Two weights are connected by a very light flexible cord that passes over a Wpulley = 40.0-N…

A: The weight of the pulley is Wpulley=40.0 N The radius of the pulley is R=0.400 m The weight of the…

Q: An object can rotate but not exhibit no angular acceleration and no linear or translational…

A: To find:The conditions necessary for the object to be in static equilibrium. A body is said to be in…

Q: What is the net torque about the axle? Express your answer to three significant figures and include…

A: Given:- From the figure given in the question  F1= 10 N F2= 10 N The length of the rod is L= 100 cm.…

Q: A student holds a bike wheel and starts it spinning with an initial angular speed of 7.0 rotations…

A: Given data: The initial angular speed is ni=7.0 rotation per second. The time taken is t=10.0 s.…

Q: The moment of inertia for a rigid body that is rotating at an angular acceleration of 4 rad/s2, on…

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Q: A diver leaves the platform with her body straight. Her body is in a relatively slow rotation, with…

A: The rotation is about the centre of mass of the model, so the moment of inertia is,Substitute the…

Q: 200 g mass is hung at the zero mark of a meter stick (mass 25g).  If the pivot point is at the 10 cm…

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Q: unicycle wheel is essentially a thin cylindrical shell, with radius 28 cm and mass of 440 g. A…

A:

Q: If you are looking at the face of a standard analog wall clock (or wrist watch), when the second…

A: According to the convention, any clock that produces anticlockwise rotating moment is positive and…

Q: meter stick has a fixed axis of rotation at 50 m. A 4 kg mass is located at the 10 m marker, a 5 kg…

A: Length of the meter stick is L = 50 m For the system to be in equilibrium, the net torque of the…

Q: A dancer begins performing a pirouette with arms extended. (A pirouette is a complete spin about a…

A: A dancer begins performing a pirouette with arms extended is actually a spinning motion.  As all…

Q: According to conservation of angular momentum, if the moment of inertia of a rotating object is…

A: Write the equation for the angular momentum. L=Iω    ........ (1) Here, The linear momentum of the…

Q: A CD spins at a constant angular velocity of 5.0 revolutions per second clockwise. Which of the…

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Q: An “Atwood’s machine” consists of two objects connected by a light string that passes over a pulley…

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Q: You push on a rectangular door at the location of the knob. The door s mass is 65.1 Kg, and it's…

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Q: A 4.54 kg, 33.8 cm radius fly-wheel is initially spinning at a speed of 754 rpm. How much torque…

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Q: During the launch from a board, a diver's angular speed about her center of mass changes from zero…

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Q: A couterclockwise torque of +1.10 N•m is applied to a bicycle wheel of radius 26 cm and mass 0.72…

A: Torque = 1.1 Nm Radius of ring = 26 cm = 0.26 m  mass = 0.72 Kg Moment of inertia of a ring = M R 2…

Q: Three forces try to rotate a seesaw. For d₁= 50 cm, d₂ = 30 cm, d3 = 60 cm, 0 = 15°, 30°, |F₁|= 180…

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Q: You are holding a 20 kg dumbbell straight out at arm's length. Assuming your arm is 0.80 m long,…

A: Given data The mass of the dumbbell is m=20 kg The length of the arm is L=0.80 m   The torque…

Q: A 175-N x m torque is applied to a disk with a moment of inertia 66 kg x m. If the disk starts from…

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Q: On the Wheel of Fortune game show, a solid wheel (of radius 7 m and mass 10 kg) is given an initial…

A: Given Data: The radius is, R=7 m. The mass is, m = 10 kg. The angular velocity is, v=1.14 rad/s.…

Q: On an old-fashioned rotating piano stool, a student sits holding a pair of dumbbells at a distance…

A: The initial moment of inertia of the system was Ii=(5+2×5×0.602) kg.m2=8.6 kg.m2 The initial angular…

Q: A flywheel in the form of a uniformly thick disk of radius 1.28 m has a mass of 95.6 kg and spins…

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Q: A tall telephone pole with massm and length L has just been placed in the ground. Before the wires…

A: Draw the free-body diagram of the telephone pole.

Q: A machine part rotates at an angular speed of 0.02 rad/s; its speed is then increased to 3.3 rad/s…

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Q: A 429 kg merr-go-round in the shape of a solid disc is set in motion by applying a force…

A: Given Data : The mass of the merry-go-round is given as m = 429Kg. The radius of the merry-go-round…

Q: The fly wheel is an important mechanical element in machines that is used to increase the moment of…

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Q: True or False: Net torque always equals moment of inertia times angular acceleration.

A: BY SECOND LAW OF ROTATIONAL MOTION NET TORQUE

Q: A pirate demands that his 75 kg prisoner “walk the plank”. The prisoner walks out on an 8.0 m long,…

A:

Q: A uniform cylinder of radius 27 cm and m cm from the central longitudinal axis of t the cylinder is…

A: Given data radius = 27 cm , mass = 16 kg

Torque

Torque is the rotational equivalent of linear force in physics and mechanics. Based on the course of study, it is also known as the moment of force, rotational force, or turning effect.