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Q.

Velocity of a particle at time t = 0 is 2ms-1 . A constant acceleration of 2ms-2 acts on the particle for 1 second at an angle of 600 with its initial velocity . Find the magnitude of velocity at the end of 1 second. 

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a

3 m / s

b

23 m / s

c

 4 m / s 

d

 8 m / s

answer is B.

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Detailed Solution

v=vxi^+vyj^:vx=ux+axt  ,  vy=uy+ayt

ax=acosθ,ay=asinθ

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