A body is projected with an initial speed of 100sqrt(3)ms^(-1) at an angle of 60^(@) above the horizontal. If g=10ms^(-2) then velocity of the projectile (a) Is perpendicular to it.s acceleration at the instant t = 15 sec (b) Is perpendicular to inital velocity of projection at t = 20 sec. ( c)Is minimum at the highest point (d) Changes both in magnitude and direction during its flight. Mark the answer as

A body is projected with an initial speed of 100sqrt(3)ms^(-1) at an a

1.	A body is projected with an initial speed of 100sqrt(3)ms^(-1) at an angle of 60^(@) above the horizontal. If g=10ms^(-2) then velocity of the projectile (a) Is perpendicular to it.s acceleration at the instant t = 15 sec (b) Is perpendicular to inital velocity of projection at t = 20 sec. ( c)Is minimum at the highest point (d) Changes both in magnitude and direction during its flight. Mark the answer as
Answer» if a, B, C and d are CORRECT if a, c and d are correct if b, c and d are correct if a, b and d are correct ANSWER :A