A physics student with a moment of inertia of 0.600 kg·m2 stands on a perfectly massless, frictionless rotating platform. While at rest, she holds a bicycle wheel with a moment of inertia of 0.280 kg·m2 , which is rotating clockwise as seen from above at 7.00 rad/s. She turns the wheel upside-down. What is her angular velocity now and in what direction (as seen from above)?

Q: A figure skater has a moment of inertia of 0.39 kg-m2. He is spinning at 251.6 rpm. He extends his…

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Q: A compact disc in a turntable rotates through 6.0 rad in 4.4 s as it is accelerated uniformly from…

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Q: During a certain time, interval, the angular position of a swinging door is described by…

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Q: A disk is initially spinning at +3600 rpm. It increased its angular velocity to +7200 rpm in 9 sec.…

A: Given values: Initial angular velocity, ω1=3600 rpm Final angular velocity, ω2=7200 rpm Time, t=9 s

Q: A wheel of diameter 20 cm is rotating at 600 r.p.m. The linear velocity of particle at its rim is.…

A: To find-Linear velocity (V)=?Given-Diameter of wheel (D)=20 cmRadius of wheel (r)=202=10 cmFrequency…

Q: A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.915…

A: In this question we are given that a horizontal circular platform rotates counterclockwise about its…

Q: An electric drill rotates at 1800 rev/min. Through what angle does it turn in 2 ms? If it reaches…

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Q: Figure skater rotating at 5rad/s with arms extended, moment of inertia is 2.25 kg * m^2. The skater…

A: The formula for the angular momentum is:

Q: A large rotating flywheel uniformly increases in angular speed from rest to 0.170 rev/s in 26.0 s.…

A: The objective of the question is to find the angular acceleration of a rotating flywheel which…

Q: A 30 kg child stands on the edge of a stationary merry-go-round of mass 100 kg and radius 2.0 m.…

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Q: YURI!!! on air. For his final stunt, Yuri is go a jump with turns and has his arms exten moment of…

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Q: A circular pulley of radius 0.35 [m] can rotate on frictionless bearing. A massless string passes…

A: from kinematic equation of motion          v² - u² = 2as           92 - 02 = 2×a x 4             a =…

Q: In a softball windmill pitch, the pitcher rotates her arm through just over half a circle, bringing…

A: Given data *The initial angular velocity is ωi = 12.0 rad/s *The final angular velocity is ωf = 24.0…

Q: An ice skater rotates at 2.3 rev/s with arms outstretched. He collects his arms and spins at 15.6…

A: Moment of inertia, in physics, quantitative measure of the rotational inertia of a body—i.e., the…

Q: A flywheel slows from 543 rev/min to 397 rev/min while rotating through 43 revolutions. (a) What is…

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Q: Zorch, an archenemy of Superman, decides to slow Earth's rotation to once per 29 h exerting a force…

A: It is an easy question. Now first thing we have to do is to convert time period to angular velocity…

Q: B 15 cm For the system given in the figure, the radius of the gear is given as 15cm and it rolls on…

A: radius of the gear is guven as 15cm Constant Angular velocity = 5 rad/s Angle = 50°

Q: In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm…

A: Given: The given values are, The given angular velocity of the ball is, ω=35.0 rad/s. And the ball…

Q: A car of mass 7,772 kg moves with a speed of 27 m/s on a circular track with a diameter of 797 m.…

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Q: A gymnast is performing a floor routine. In a tumbling run she spins through the air, increasing her…

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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 43 kg boy is seated at the edge of a 5.0 m diameter merry go round. The merry-go-round disc has a…

A: mass of boy, m = 43 kg  mass of disc, M = 90kg  radius, R = 2.5 m  Angular velocity, w = 18 rpm…

Q: A merry-go-round with a moment of inertia equal to 1300 kg⋅m2 and a radius of 2.5 m rotates with…

A: The momentum of inertia of the merry-go-round isI1=1300 kg·m2The radius of the merry-go-round…

Q: vertical plastic rod of mass M and length L is free to rotate about its center but is at rest. A…

A: Mass of rod = M Lengh = L Mass of bullet (m) = M/18

Q: Three children are riding on the edge of a merry-goround that is 100 kg, has a 1.60-m radius, and is…

A: Given data: Mass of the marry – go – round, M=100 kg Radius, r=1.60 m Initial angular velocity,…

Q: A 200 g puck revolves in a circle on a frictionless table at the end of a 50.0 cm long string. The…

A: Consider the mass of the puck be m, the angular momentum of the puck be L, the radius of the circle…

Q: A barbell spins around a pivot at its center at A. The barbell consists of two small balls, each…

A: Given : Mass (m) = 500 g = 0.5 kg Length (d) = 30 cm = 0.3 m Radius (r) = 0.15 m Angular speed (w) =…

Q: An ice skater is spinning at a rate of 2 rad/sec.  She extends her arms and increases her moment of…

A: Initial and final moment of inertia= 1.22 & 2.5 Kgm2

Q: A student sits at rest on a piano stool that can rotate withoutfriction. The moment of inertia of…

A: The initial and final angular momentum should be same.

Q: A 45.0cm diameter disk rotates with a constant angular acceleration of 2.50rad/s. It start from rest…

A: Given, Diameter of disk d = 45 cm =  0.45 m Angular acceleration α=2.50 rad/s2 t = 2.30 s Angle θ =…

Q: A 3m diameter merry-go-round with a mass of 250kg is spinning at 20 rpm. John runs tangent to the…

A: diameter (d) = 3 m Mass of merry go round (m) = 250 kg Initial speed (u) = 5 msInitial angular speed…

Q: The blades of a ceiling fan have a radius of 0.77 m and are rotating about a fixed axis with an…

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Q: In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm…

A: Angular velocity (ω) = 32 rad/sDistance of ball from elbow joint (d) = 1.25 m

Q: A 1.9-kg hoop rolls without slipping on a horizontal surface so that its center proceeds to the…

A: The objective of the question is to calculate the angular momentum of a hoop rolling without…

Q: A turntable is off and is not spinning. A 1.5 g ant is on the disc and is 10 cm away from the…

A: Soluction

Q: In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm…

A: Given data:  Angular velocity (ω) = 30.0 rad/s Radius (r) = 1.40 m Required: The velocity of the…

Q: A figure skater has a moment of inertia of 0.45 kg-m2. He is spinning at 315.6 rpm. He extends his…

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Q: Shohei Ohtani pitches a fastball with a horizontal velocity of 40 m/s. The horizontal distance from…

A: Given: Horizontal velocity of Shohei Ohtani's fastball = 40 m/s Horizontal distance from the point…

Q: An airplane propeller is rotating at 1900 rpm 1rev/min2. (a)Computethe propeller’s angular velocity…

A: Given: An airplane propeller is rotating at 1900 rpm.a. As we know,1 rpm means revolution per minute…

Q: A compact disk on a CD player rotates clockwise. The disk completes one revolution in 0.332 s. (a)…

A: Given Time taken to complete one revolution t=0.332sDistance of point r=4.73cm=0.0473 m

Q: In lacrosse, a ball is thrown from a net on the end of a stick by rotating the stick and forearm…

A: Given data: Angular velocity (ω) = 1580 degree/sec,its change into radian/sec so,1580 Deg × π/180 =…

Q: A rotating table, with moment of inertia 29 kg·m2, is spinning at 40 rpm. A piece of clay is dropped…

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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.