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Author Archives: Anonymous

A circular-motion addict of mass 40.0 kg rides a Ferris whee…

A circular-motion addict of mass 40.0 kg rides a Ferris wheel around in a vertical circle of radius 12.0 m at a constant speed of 5.0 m/s. What is the magnitude of the normal force on the addict from the seat when both go through the highest point of the circular path?

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A  spring stretches 1.68 cm vertically when a 1.50 kg object…

A  spring stretches 1.68 cm vertically when a 1.50 kg object is suspended from it.  Find the distance (in cm) the spring stretches if you replace the 1.50 kg object with a 4.40 kg object. Assume that the spring obeys the Hook’s law.

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A horizontal vinyl record of mass 0.0522 kg and radius 0.093…

A horizontal vinyl record of mass 0.0522 kg and radius 0.0932 m rotates freely about a vertical axis through its center with an angular speed of 5.71 rad/s and a rotational inertia of 2.02 x 10-4 kg·m2. Putty of mass 0.0189 kg drops vertically onto the record from above and sticks to the edge of the record.What is the angular speed of the record immediately afterwards?

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Suppose the coefficient of static friction between the road…

Suppose the coefficient of static friction between the road and the tires on a car is 0.4 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 34.0 m radius?

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A circular-motion addict of mass 90.0 kg rides a Ferris whee…

A circular-motion addict of mass 90.0 kg rides a Ferris wheel around in a vertical circle of radius 12.0 m at a constant speed of 5.0 m/s. What is the magnitude of the normal force on the addict from the seat when both go through the highest point of the circular path?

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A puck of mass m = 1.60 kg slides in a circle of radius r = …

A puck of mass m = 1.60 kg slides in a circle of radius r = 18.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 3.0 kg by a cord through a hole in the table. What speed keeps the cylinder at rest?

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Suppose the coefficient of static friction between the road…

Suppose the coefficient of static friction between the road and the tires on a car is 0.4 and the car has no negative lift. What speed will put the car on the verge of sliding as it rounds a level curve of 46.0 m radius?

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One end of a 2.0-m long string is fixed; the other end is at…

One end of a 2.0-m long string is fixed; the other end is attached to a 4.0-kg stone. The stone swings in a vertical circle, passing the bottom point at 4.0 m/s. The tension force of the string at this point is about:

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The only force acting on a 3.5 kg body as it moves along the…

The only force acting on a 3.5 kg body as it moves along the positive x axis has an x component Fx = -5x N, where x is in meters. The velocity of the body at x = 2.3 m is 9.6 m/s. What is the velocity of the body at x = 4.1 m? 

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A flywheel with a diameter of 1.23 m is rotating at an angul…

A flywheel with a diameter of 1.23 m is rotating at an angular speed of 150 rev/min. What is the linear speed (in m/s) of a point on the rim of the flywheel? 

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