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With many how revolutions per minute do you have to whirl a ball ona string in a horizontal circle of radius 0.92 m if the magnitudeof its centripetal acceleration is to be the same as the free-fallacceleration due to gravity, 9.81 m/s2? Do not enter units.
A 0.500 kg particle moves in a circle of radius R=0.150 m at constant speed. The time for 20 complete revolutions is 31.7 sec. What is the magnitude of the centripetal acceleration?
A runner rounds a circular curve of radius 24.0 m at a constantspeed of 5.50 m/s. What is the magnitude of the runner'scentripetal acceleration?
