If you hold your arm outstretched with palm upward the force to keep your arm from falling comes from your deltoid muscle. Assume that the arm has mass 4.0 kg and the distances and angles shown in figure 1. What force must the deltoid provide to keep the arm in this position.

Gravity is pulling an object into the sun. the closer the object gets to the sun, the greater the gravitational force that acts on the object, increasing its acceleration. a line graph plotting the speed of the object against time would have which shape? a: straight line of positive slope b: curved line that slopes upward c: curved line that slopes downward d: straight line of negative slope