Final answer:
The highest barrier that a projectile can clear depends on its initial velocity and the angle of projection.
Step-by-step explanation:
In projectile motion, the highest barrier that a projectile can clear depends on its initial velocity and the angle of projection. The initial velocity determines how far the projectile can travel horizontally, while the angle of projection determines the maximum height the projectile can reach.
For example, if the initial velocity is very high, the projectile can cover a larger horizontal distance, allowing it to clear a higher barrier. Similarly, if the angle of projection is close to vertical, the projectile can go higher and have a better chance of clearing the barrier.