An electrical motor spins at a constant 1975.0 rpm. if the armature radius is 7.112 cm, what is the acceleration of the edge of the rotor? o 305,200 m/s o 152.3 m/s o 15.20 m/s o 3042 m/s

Option D is the correct answer.

Explanation:

Since value of angular acceleration is constant, the body has only centripetal acceleration.

Centripetal acceleration

We have radius = 7.112 cm = 0.07112 m

Frequency, f = 1975 rpm = 32.92 rps

Angular frequency, ω = 2πf = 2 x π x 32.92 = 206.82 rad/s

Substituting in centripetal acceleration equation,

Option D is the correct answer.                

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