Ip force to hold a baseball a person holds a 1.42-n baseball in his hand, a distance of 34.0 cm from the elbow joint, as shown in the figure(figure 1) . the biceps, attached at a distance of 2.75 cm from the elbow, exerts an upward force of 12.6 n on the forearm. consider the forearm and hand to be a uniform rod with a mass of 1.50 kg . what is the net torque?

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

J. j. thomson’s experiment disproved the theory that an atom