Questions on projectile Motion

    Our interesting, somewhat handsome, evil physic teacher Mr.Chung asked us to blog some of the projectile motion questions he gave us. there are 5 type of projectile motion in total for grade 11 physic according to Mr. Chung's word. some of the questions are really straight forward, and some are little tricky to handle. but i don't think Mr. Chung will leave us alone with only this amount of work, this might only be the beginning............
Anyway, here are some of the answers to the questions on the projectile worksheet.
more questions will be posted afterwards :