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Q.

A particle of mass 100gm is rotating in a circular path of radius 1m. When its speed is 5m/s, total acceleration vector of the particle makes an angle of 45o with the centripetal acceleration vector. At that instant tangential acceleration of the particle is

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a

20 m/s2

b

25 m/s2

c

10 m/s2

d

5 m/s2

answer is B.

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Detailed Solution

atan=tanθ=tan45o⇒at=antan45o=521 x 1 m/s2⇒at=25 m/s2.
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