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A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?

/ Applied Mechanics and Graphic Statics / By
A projectile has maximum range of 40 m on a horizontal plane. If angle of projection is a and the time of flight is 1 second, then sin a must be about__________________?

A. 1/4(Correct)
B. 1/3
C. 1/2
D. 1/5

Assume g = 10 m/sec2