Use this free body diagram to you find the magnitude of the force f1 needed to keep this block in static equilibrium?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Balloon a has charge q, and identical mass balloon b has charge 10q. you hang them from threads near each other. choose all of the statements with which you agree. check all that apply. a. a and b exert the same magnitude forces on each other. b. the force that a exerts on b is 10 times the force that b exerts on a. c. the angle between the thread supporting a and the vertical is < the angle between the thread supporting b and the vertical. d. the force that a exerts on b is 1/10 the force that b exerts on a.

The discovery of the electron as a subatomic particle was a result of