A uniform plank us supported by a hinge at one end. What is the magnitude (expressed as a multiple of the plank's weight Fg) of the upward force you have to exert on the other end to keep the plank at rest and level?
Imagine that you are standing on a scale in an elevator and you find that your apparent weight as read by the scale is half your real weight. What is the elevator's z acceleration az relative to the ground? Express you answer as a multiple of g, and make sure that your value for az has the...
A reasonably large object moving though air experiences a drag force proportional to the square of its speed. If an object is falling vertically downward at half its terminal speed, how does the drag force acting on it compare to the force of gravity? express your answer as a multiple of Fg