Q.
A body is projected from the origin into the space with a velocity2i^+4j^+2k^ xz is horizontal plane. The horizontal range of the projectile is g=10 ms−2
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a
425m
b
825m
c
8 m
d
4 m
answer is B.
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Detailed Solution
u→=2i^+4j^+2k^ux→=2i^+2k^ [∵xz is horizontal plane]uy→=4j^|ux→|=22+22, |uy→|=4 =22, R=2.ux.uygR=2(22)410 = 825m
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