five spiders are on top of a record that is turning with an angular velocity of

Question

five spiders are on top of a record that is turning with an angular velocity of 45 rpm. rank the following locations according to acceleration a that a spider would feel at that spot, from smallest to largest.
a) spider A sitting 5 cm from the center of rotation
b) spider B is sitting 12.5 cm from the center of rotation
c) spider c is 27.5 cm from the center of rotation but is walking in a circle concentric with the center of the record, with an angular velocity of negative 45 rpm so that it appears to be standing still to the observer.
d) spider D is also 27.5 cm from the center of rotation, following spider C, but can only walk as fast as negative 25 rpm.
e) spider E sits 32.5 cm from the center of rotation.

Explanation / Answer

acceleration = v^2/radius acceleration in inversely proportional to distance from center therefore if radius is maximum then the acceleration is minimum rank are first - e second - d third = d forth = c fifth = b sixth = a

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