I got A, but was unable to determine b and c. Please help!
A block is projected up a frictionless inclined plane with initial speed v0 = 4.46 m/s. The angle of incline is θ = 23.7°. (a) How far up the plane does it go? (b) How long does it take to get there? (c) What is its speed when it gets back to the bottom?