A body is projected horizontally with a velocity of 4√2 m/sec. The velocity of the body after 0.7 seconds will be nearly: (Take g=10m/sec2)
A
10 m/sec
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B
9 m/sec
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C
19 m/sec
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D
11 m/sec
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Solution
The correct option is D 9 m/sec Since only gravitational force acts on the object downwards, the horizontal component of velocity remains same=vx=4√2m/s
Initially there is no vertical component of the velocity.
Thus the final velocity in vertical direction =vy=at=10×0.7m/s=7m/s