*$_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 (Assume g = 10 m/sec¬¨‚â§)?

*$_A projectile has maximum range of 40 m on a horizontal plane. If an

1.	*$_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 (Assume g = 10 m/sec¬¨‚â§)?
A.	1/4
B.	1/3
C.	1/2
D.	1/5
Answer» B. 1/3

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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 (Assume g = 10 m/sec¬¨‚â§)?

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