Hey guys, I'm taking A Level Physics, at the moment in AS level (lower level) studying kinematics, pretty straight forward but I am having trouble with projectile motion. I can't think of a question but this is like the question I had on my physics paper the other day. A ball is thrown with a certain velocity (neglecting air resistance) and comes in contact with a wall, whilst in contact for 0.4s the ball bounces back' And I have to work out the velocity at which the ball rebounds of the wall, the change in kinetic energy but I'm hoping you guys have come across these sort of questions before and that you'll be able to help me :P I know you have to work out the horizontal and vertical components of the projection but I always get confused with some of the questions. I'm sorry if I can't provide enough info. but basically questions which involve SUVAT equations with projectile motion. Thanks for any help, much appreciated, Revising for Chem., Maths and Physics woo! Thanks, SK.