Pat Kinch used a racing cycle to travel 20.0 m/s. Suppose Kinch moved at this speed around a circular track. If the combined mass of Kinch and the
cycle was 92.0 kg and the average centripetal force was 920 N, what was
the radius in meters of the track? (Centripetal Force: Fc = m(v^2)/r ) (Write
the number answer only.)

The image shows the positions of a car on a roller coaster track. arrange the cars in order based on their gravitational potential energy. begin with the lowest potential energy and end with the highest.

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The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .