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A child pulls a box with a force of 200 N at an angle of 60°above the horizontal. Then the horizontal and vertical components of the force are -

              

(A)  100 N, 175 N

(B)  86.6 N, 100 N

(C)  100 N, 86.6 N

(D)  100 N, 0 N

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A man rows a boat with a speed of 18 km/hr in northwest direction. The shoreline makes an angle of 15° south of west. Obtain the component of the velocity of the boat along the shoreline.

(A)  9 km/hr

(B)  1832 km/hr

(C)  18 cos 15° km/hr

(D)  18 cos 75° km/hr

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If A=2i^+j^ & B=i^-j^ . Find component of A along B & perpendicular to B.

(A)  i^-j^2, 32i^+j^

(B)  i^-j^2,- 23i^+j^

(C)  i^-j^2, -32i^-j^

(D)  i^-j^2, 23i^-j^

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