# OCR A Level: Mechanics 2 - Projectile Motion [June 2009 Q7]

**Classical Mechanics**Level pending

\((\text{i})\) Calculate the height above the ground of the point where the ball hits the fence.

\((\text{ii})\) Calculate the direction of motion of the ball immediately before it hits the fence.

\((\text{iii})\) It is given that 30% of the kinetic energy of the ball is lost when it hits the fence. Calculate the speed of the ball immediately after it hits the fence.

**Input your answer to part \((\text{iii})\), correct to 3 significant figures.**