Suppose an ice skater has moment of inertia of 8 kg m^2 while spinning with arms wide open and 6 kg m^2 if she closes her arms. If she spins at 120 rpm with arms open, what is the angular velocity does she has as a result of closing her arms.

Q: A sanding disk with rotational inertia 2.0 x 103 kg-m² is attached to an electric drill whose motor…

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Q: A ventilation fan with a moment of inertia of 8.2 kg-m2 has a net torque of 4.1 N-m applied to it.…

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Q: A merry-go-round has a radius of 2.4 m and a moment of inertia 622 kg · m2. A boy of mass 48 kg runs…

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Q: A ventilation fan with a moment of inertia of 9.4 kg-m2 has a net torque of 7.1 N-m applied to it.…

A: Given data The moment of inertia is given as I = 9.4 kgm2. The net torque is given as T = 7.1 Nm.…

Q: A ventilation fan with a moment of inertia of 4.1 kg-m2 has a net torque of 8.7 N-m applied to it.…

A: Given data: Moment of inertia (I) = 4.1 kg.m2 Net torque (τ) = 8.7 N-m Time (t) = 2.7 s Required:…

Q: A skater has a moment of inertia of 120kg m2 when his arms are outstretched and a moment of inertia…

A: Moment of inertia of skater with outstreched arms = 120 kgm2Moment of inertia of skater with arms…

Q: What is the magnitude of the angular momentum of a 500 g, 0.5 m long bar rotating at 60 rpm about an…

A: The expression for the required magnitude angular momentum is,

Q: A ventilation fan with a moment of inertia of 4.6 kg-m2 has a net torque of 8.6 N-m applied to it.…

A: Calculate the angular acceleration of the fan. α=τI=8.6 N·m×1 kg·m/s21 N4.6 kg·m2=1.87 rad/s2 Here,…

Q: A sanding disk with rotational inertia 5.2 x 103 kg-m² is attached to an electric drill whose motor…

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Q: A disk with a moment of inertia about its center of mass of 1.6 kgm2 is rotating about its center of…

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Q: A meter stick is hinged at its lower end and allowed to fall from a vertical position. If its moment…

A: Given:           Moment of inertia I=ML2/3

Q: A skater has a moment of inertia of 3 kg.m2 ( kilogram.meter squared) when her arms are outstretched…

A: Given Information:- Moment of inertia of the skater when her arms are outstretched is Ii=3 kg.m2…

Q: A physics teacher on a spinning chair has a moment of inertia of 4.5 kg m^2 with his arm…

A: Given Data: The moment of inertia of the physics teacher when his arms are outstretched is: Io=4.5…

Q: consider the system of particles that are connected by rigid rods of neglible mass. if the system…

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Q: A girl of mass 31.7 kg stands on the rim of a frictionless merry-go-round of radius 1.97 m and…

A: In the given question , We have to determine the values of given parts.

Q: A girl of mass 35.1 kg stands on the rim of a frictionless merry-go-round of radius 1.51 m and…

A: Given that---- mass of merry ground = 35.1 kg rock mass = 600 g. Rotational inertia I = 247 kg - m2…

Q: A figure skater can increase her angular velocity from a speed of 2.00 revolutions in 3.00 seconds…

A: Initial speed = 2 revolutions per sec final speed = 5 revolutions per sec T = 2 sec Moment of…

Q: A sanding disk with rotational inertia 3.4x 103 kg-m² is attached to an electric drill whose motor…

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Q: A uniform solid disk with radius 8 cm has mass 0.5 kg (moment of inertia I = (1/2)MR²). A constant…

A: M= 0.5kg  R= 8cm  I = 0.5 MR2  F= 14 N  d= 22cm  w1 = 45 rad/s

Q: Suppose the moment of inertia of an ice skater is 0.80 kg·m2 when her arms and legs are pulled in,…

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Q: A uniform disk of mass 4.46 kg has a radius of 0.100 m and spins with a frequency of 0.550 rev/s.…

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Q: During a jump to his partner, an aerialist is to make a quadruple somersault lasting a time t = 1.51…

A: Given that the value of time and rotational inertia I 1 and rotational inertia I2.Then We  have to…

Q: The uniform rod (length 0.375 m) in the figure rotates in the plane of the figure about an axis…

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Q: A wheel on a car has an angular momentum of 5.00 kg m2/s.  If the radius of the wheel is 0.25m, what…

A: Given data: Angular momentum is, L=5.00 kg·m2/s. Radius of wheel is, r=0.25 m.

Q: A skater is spinning at 1 rev/s with her arms outstretched so that her moment of inertia is 2.4…

A: If net torque on the system is zero then the angular momentum of the system is conserved. The unit…

Q: A typical helicopter with four blades rotates at 300 rpm and has a kinetic energy of 2.45  105 J.…

A: Using rotational kinetic energy,

Q: A grinder consists of a 5.34 kg steel block on a 1.87 m long arm that spins around a table. If the…

A: Use the Newton’s second law of motion,

Q: A sanding disk with rotational inertia 9.8 x 10-3 kg-m² is attached to an electric drill whose motor…

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Q: A ventilation fan with a moment of inertia of 4.9 kg-m2 has a net torque of 4.1 N-m applied to it.…

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Q: In figure skating, kelen rotated at an angular speed of 9.04 rad/s with her arms pulled in. At the…

A: The given values are, ωi=9.04 rad/sIi=3.05 kg·m2ωf=4.37 rad/s

Q: A bullet of mass m=2.0g is moving horizontally with a speed of 500.0m/s. The bullet strikes and…

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Q: A sanding disk with rotational inertia 5.0 x 10 kg-m? is attached to an electric drill whose motor…

A: rotational inertia =  I = 5 X 10-3 Kg-m2 torque = 33 N-m

Q: Suppose that the moment of inertia of a skater with arms out and one leg extended is 3.3 kg m? and…

A: When there is no external torque on a body, then the angular momentum of the object remains…

Q: A sanding disk with rotational inertia 1.2x 103 kg•m² is attached to an electric drill whose motor…

A: a)If ∆L be the change in angular momentum within time ∆t then torque  τ=∆L∆t     ...(1)

Q: A girl of mass 31.8 kg stands on the rim of a frictionless merry-go-round of radius 1.63 m and…

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Q: A sanding disk with rotational inertia 4.6x 10 ° kg-m² is attached to an electric drill whose motor…

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Q: A sanding disk with rotational inertia 1.2 * 10-3 kg m2 is attached to an electric drill whose…

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Q: A figure skater can increase her spin rotation rate from an initial rate of 1.0 rev every 1.6 s to a…

A: Given Initial rate of rotation n1=1.0 rev in 1.6 s                                n1=0.625…

Q: We can model a small merry-go-round as a uniform circular disk with mass 88 kg and diameter 1.8 m.…

A: mass of disc, M = 88 kg diameter, d = 1.8 m radius, r = 0.9 m   mass of each child, m = 22 kg

Q: In the Olympic hammer throw, a contestant whirls a 7.3‐kg steel ball on the end of a 1.2‐m  cable.…

A: Angular momentum of any object is the product of its radius of rotation with the it linear momentum.…

Q: A sanding disk with rotational inertia 3.3 x 103 kg-m2 is attached to an electric drill whose motor…

A: Rotational Inertia,I= 3.3*10^-3 kg.m2 torque= 43 N.m time , t= 77*10-3 seconds

Q: A 2 kg rectangular thin plate has length of 0.5 m and width 0.20. the moment of inertia of the plate…

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Q: A sanding disk with rotational inertia 9.1 x 10-3 kg·m2 is attached to an electric drill whose motor…

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Q: A force of 10 N is applied tangentially to a wheel of radius 0.50 m and causes an angular…

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