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?

Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.

Determine the maximum r-value of the polar equation r =3+3 cos 0

What is the temperature in degrees celsius of a substance with a tempature of 49k