physics

Okay to be honest with u guys i had a really strange dream last night and i am trying to get past it but i cannot figure it out. I had a dream that i made a water fountain that basically never stopped as long as the top reservoir was full which i expect is not possible. Okay here is my...

Here's this quetion: A block of mass m is released from rest at a height of R above a horizontal surface, the acceleration due to gravity is g. (mspaint is cool!) What is the magnitude of the normal force exerted on the block by the hoop when the block has reached the bottom? It's a multiple...