The potential energy of a projectile at its maximum height is equal to its kinetic energy there. If the velocity of projection is 20ms^(-1), its time of flight is (g=10ms^(-2))

The potential energy of a projectile at its maximum height is equal to

1.	The potential energy of a projectile at its maximum height is equal to its kinetic energy there. If the velocity of projection is 20ms^(-1), its time of flight is (g=10ms^(-2))
Answer» 2S `2sqrt(2)s` `1/2 s` `(1)/(SQRT(2))s` ANSWER :B