A ball is thrown into the air at an angle of 60° above the horizontal with an initial velocity of $40m/s$ from a 50-m-high building. Find the time it takes the ball to reach the top of its path and the maximum height the ball has reached from the base of the building.
A projectile is fired horizontally at a speed of $8 m/s$ from an 80-m-high cliff. Find the velocity just before the projectile hits the ground and the angle of impact.
A ball is shot with an initial velocity of $10m/s$ at an angle of 45° from the ground from the base of a 30° inclined plane and lands on it. How long has it travelled up the incline?