A child exerts a tangential 65.3 N force on the rim of a disk-shaped merry-go-round with a radius of 2.09 m. f the merry-go-round starts at rest and acquires an angular speed of 0.7250 rev/s in 5.00 s, what is its mass?

A student holds a bike wheel and starts it spinning with an initial angular speed of 9.0 rotations per second. The wheel is subject to some friction, so it gradually slows down. In the 10.0 s period following the inital spin, the bike wheel undergoes 65.0 complete rotations. Assuming the frictional torque remains constant, how much more time Ats will it take the bike wheel to come to a complete stop?

A car initially traveling at 32.2 m/s undergoes a constant negative acceleration of magnitude 1.50 m/s after its brakes are applied. (a) How many revolutions does each tire make before the car comes to a stop, assuming the car does not skid and the tires have radii of 0.325 m? 506.279 Your response differs from the correct answer by more than 100%. rev (b) What is the angular speed of the wheels when the car has traveled half the total distance? rad/s

A disc-shaped grindstone of mass 3.0 kg and radius 8.0 cm is spinning at 600 revolutions/min. The moment of inertia of a disc rotating about its center is given by I = }MR² The power is shut off by the operator and to slow it down, she sharpens a 3 kg axe by holding it against the grindstone until it stops 10 s later. Assuming the ang acceleration is constant while the grindstone is slowing down, find the magnitude of the net frictional torque exerted by the axe on the grindstone. 0.060 Nm 603.17 Nm 0.576 Nm O 5760 Nm 0.121 Nm

Consider the father pushing a playground merry-go-round. He exerts a force of 250 N at the edge of the 50.0-kg merry-go-round, which has a 1.50-m radius. Calculate the angular acceleration produced (a) when no one is on the merry-go-round and (b) when an 18.0-kg child sits 1.25 m away from the center. Consider the merry-go- round itself to be a uniform disk with negligible friction.

When kicking a football, the kicker rotates his leg about the hip joint. (a) If the velocity of the tip of the kicker’s shoe is 35.0 m/s and the hip joint is 1.05 m from the tip of the shoe, what is the shoe tip’s angular velocity? (b) The shoe is in contact with the initially stationary 0.500 kg football for 20.0 ms. What average force is exerted on the football to give it a velocity of 20.0 m/s? (c) Find the maximum range of the football, neglecting air resistance.

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Pls help ASAP.

A uniform ring with the mass of 4 kg and a radius of 20 cm is rotating at a rate of 20 rad/s. What is the angular momentum of the ring?

Two tangential forces F1 = 25 N and F2 = 10 N are applied to the rim of a solid cylinder of radius R = 0.2 m. The cylinder starts to rotate from rest, and reaches angular speed of 50 rpm in 5 seconds. Find the mass of the cylinder.