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=10 ~m / sec ^2 )

Step-by-step solution

After 0.7 sec the horizontal velocity component of the body =4 2 ~m / sec since there is no change in velocity in horizontal direction. The vertical velocity component after 0.7 seconds =0+g t=0+0.7 10=7 ~m / sec Resultant velocity of the body = (4 2 )^2+7^2 = 32+49 =9 ~m / sec