5. In projectile motion horizontal velocity of object in it's flight path is Mark only one oval. always changing always constant changed by its magnitude changed by its direction

The correct answer is **always constant**.<br /><br />In projectile motion, the only force acting on the object (neglecting air resistance) is gravity, which acts vertically downwards. Since there are no horizontal forces, there's no horizontal acceleration. Therefore, the horizontal velocity remains constant throughout the projectile's flight.<br />