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A body has an initial velocity of 3 ms-1 and has an acceleration of 1 ms-1 normal to the direction of the initial velocity. Then its velocity 4 s after the start is
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Correct option is D
Let yx=3ms−1,ax=0 yx=yx+aytt=0+1×4=4ms−1 Angle made by the resultant velocity w.r.t. direction of initial velocity, i.e., x-axis, is β=tan−1Vyvx=tan−143
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A body travelling with uniform acceleration crosses two points A and B with velocities 20ms-1 and 30ms-1 , respectively. The speed of the body at midpoint of A and B is
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