barry used a ramp to transport a load to a loading truck. the ramp made the work easier
a. increasing the size of the input force.b. reducing the input force to zero.c. changing the distance over which the input force was exerted.d. reducing the output force to zero.
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Adding more pulleys to a system of pulleys needed to lift an object. a. increases the force b. decreases the force c. increases the amount of work d. decreases the amount of work

Use the right-hand rule for magnetic force to determine the charge on the moving particle. this is a charge.

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.