In a wheel and axle, the radius of the wheel is 20 cm and the radius of the axle is 4 cm. what is the mechanical advantage?

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

What is a subatomic particle with a negative charge and very little mass?