8. Centripetal Forces & Gravitation

The Cosmo Clock 21 Ferris wheel in Yokohama, Japan, has a diameter of $100$ m. Its name comes from its $60$ arms, each of which can function as a second hand (so that it makes one revolution every $60.0$ s). What would be the time for one revolution if the passenger's apparent weight at the highest point were zero?

A centripetal force causes circular motion because it accelerates an object in which direction?

In the context of circular motion, in which direction does the $Fc$ (centripetal force) act on an object moving in a circle?

A $52$-kg ice skater spins about a vertical axis through her body with her arms horizontally outstretched; she makes $2.0$ turns each second. The distance from one hand to the other is $1.50$ m. Biometric measurements indicate that each hand typically makes up about $1.25\%$ of body weight. What horizontal force must her wrist exert on her hand?

In a roller coaster loop, at which point will the riders experience $centripetalacceleration$?

On an ice rink two skaters of equal mass grab hands and spin in a mutual circle once every 2.5 s. If we assume their arms are each 0.80 m long and their individual masses are 55.0 kg, how hard are they pulling on one another?

Which expression can be used to calculate centripetal acceleration for an object moving in a circle of radius $r$ with speed $v$?

To determine the magnitude of the centripetal acceleration $a\_c$ of a test mass moving in a circle, which of the following measurements are required?

In the context of a satellite moving in a stable circular orbit around a planet, what provides the centripetal force that keeps the satellite in its orbit?

A 100 g ball on a 60-cm-long string is swung in a vertical circle about a point 200 cm above the floor. The string suddenly breaks when it is parallel to the ground and the ball is moving upward. The ball reaches a height 600 cm above the floor. What was the tension in the string an instant before it broke?

Which force provides the $\mathrm{centripetal}\mathrm{force}$ that allows a car to move around a sharp curve on a roadway?

Which statement best explains how a $F\_c$ (centripetal force) causes circular motion?

Which formula can be used to find the centripetal acceleration of an orbiting object?