If you want to add extra protein to your diet to build muscle, what do you
also have to do to keep it safe?
1) Not add too much protein
2) Increase total caloric intake (not just protein)
3) Lift weights
4) All of the above

Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.