Two Solid Steel Balls,one Small and One Large,are on an Incline

Two solid steel balls,one small and one large,are on an incline plane.The large ball has a diameter of 3.0 cm and the small ball has a diameter of 1.0 cm.Starting from rest,the two balls roll without slipping down the incline plane until their centers of mass are 1 m below their starting positions.If it takes the large ball 2.0 seconds to roll down the inclined plane,how long will it take the small ball to roll down the inclined plane?

A) 0.67 s
B) 1.2 s
C) 2.0 s
D) 3.5 s
E) 6.0 s

Correct Answer:

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