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A :A particle moves along a line is giv...

A :A particle moves along a line is given by `s=(t^3)/3 -3t^2+8t+5` .its direction changes only when t=2.4
R : The direction of a body changes only when sigh of velocity changes

A

A,R are true and R is correct explanation of A

B

A,R are true and R is correct explanation of A

C

A is true, R is false

D

A is false ,R is true

Text Solution

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The correct Answer is:
A
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