A sled of weight 450 N is being pulled uphill by Saedie and Kojak. The hill makes a 45 degree angle with the horizontal. Find the force pulling the wagon downhill.

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

What does si stand for,when referring to a system of measurement

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?