Solve the all parts of given problem:
Problem: A 2 kg block starts at rest and slides down a frictionless ramp that makes an unknown angle with respect to the horizontal floor below. At the bottom of the ramp, after having slid a distance of 10 meters, the speed of the block is observed to be 12m/s.
Part A: What is the angle that the ramp makes with the floor?
Part B: The block now slides onto the horizontal floor with the same initial speed of 12m/s. The coefficient of kinetic friction between the block and the floor is (mu)k=0.3. From the moment it reaches the floor, how much time does it take the block to stop?
Please show complete calculation thank you!