Either print this page and complete or (better yet) neatly show your answers on a separate page of paper. All answers must be expressed as complete sentences and/or all work shown to receive credit.
A. Find the speed of the stopper.
B.Find its centripetal acceleration.
C. Find the force that the string exerts on it.
A. How would the velocity, accleration, and force change?
B. If the radius in the example problem were twice as large, but all other given quantities remained the same, how would velocity, acceleration, and force change?
C. If the stopper were swung in the same circle so it had a period half as large as in the example, how would the answers change?
A. Find the centripetal acceleration of the runner.
B. What supplies the force needed to give this accleration to the runner?
A. What is the car's centripetal acceleration?
B. What would the minimum coefficient of static friction between tires and road that would be needed for the car to round the curve without skidding?
A. What is the centripetal accleration of the hammer?
B. What is the tension in the chain?
A. If the yo-yo makes 1.0 complete revolution each second, what force does the string exert on it?
B. If sue increases the speed of the yo-yo to 2.0 revolutions per second, what force does the string now exert?
C. What is the ratio of answer b to a? why?
A. In what direction is the acceleration of the coin, if any?
B. Find the accleration of the coin when it is placed 5.0, 10, and 15 cm from the center of the record.
C. What force acclerates the coin?
D. At which of the three radii listed in b would the coin be most likely to fly off? why?
A. the speed of 97-kg person at the equator. The radius of Earth is about 6400 km.
B. The centripetal force on the person.
C. The weight of the person
Resources for physics students are available through
links on the
Physics Home Page. Such resources include the
Physics Studios (a collection of animations and movies which
illustrate key physics concepts) and
Physics Classroom (an online tutorial written in an
This page created by Suzanne Webb of Glenbrook South High School.
Comments and suggestions can be sent by e-mail to Suzanne Webb.
This page last updated on 1/26/98.