In this worksheet, we will practice analyzing the magnitudes, directions, and sources of forces that act on objects moving along circular paths.

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What is the magnitude of the centripetal force that must act on an object of mass 1.0 kg to make it move along a circular path of diameter 1.0 m, completing a circle every 1.0 s? Give your answer to the nearest newton.


A car with mass 360 kg travels at constant speed along a circular path around a flat roundabout. The radius of the roundabout is 12 m. The car takes a time of 28 s to completely travel around the roundabout.

What is the friction force between the wheels of the car and the surface of the road? Give your answer to the nearest newton.

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What is the coefficient of static friction for the wheels of the car on the surface of the road? Use a value of 9.8 m/s2 for the acceleration due to gravity. Give your answer to three decimal places.


A spinning disk has a string that holds a small sphere that has a mass of 16 g. The string is suspended from a point at a negligible distancefrom its center, as shown in the diagram. The disk rotates uniformly around itscenter with an angular velocity of 24 rad/s. The string makes an angle of