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Q.

The figure shows the overhead view of a disk rotating counterclockwise. The angular speed of the disk is decreasing. Which of the vector correctly represents a total acceleration of a point on the rim of the disk : 

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a

3

b

2

c

1

d

4

answer is C.

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Detailed Solution

For the decreasing speed of the disk, there are two accelerations an and (–at ) as shown.Component at is vertically upward and component is radially inward .

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