A block of weight 20.0 N sits on a frictionless inclined plane, which makes an angle 29.0 with respect to the horizontal, as shown in the figure. A force of magnitude 9.70 N, applied parallel to the incline, is just sufficient to pull the block up the plane at constant speed. The block moves up an incline with constant speed. What is Wg, the work done on the block by the force of gravity as the block moves a distance 4.60 m up the incline?

Express your answer in joules to three significant figures.

More solar radiation is absorbed by earth’s surface than by

Two manned satellites approaching one another at a relative speed of 0.550 m/s intend to dock. the first has a mass of 2.50 ✕ 103 kg, and the second a mass of 7.50 ✕ 103 kg. assume that the positive direction is directed from the second satellite towards the first satellite. (a) calculate the final velocity after docking, in the frame of reference in which the first satellite was originally at rest.(b) what is the loss of kinetic energy in this inelastic collision? (c) repeat both parts, in the frame of reference in which the second satellite was originally at rest. final velocity(d) loss of kinetic energy = ?

Aspacecraft that renters the earth’s atmosphere drastically slows down. the amount of kinetic energy the spacecraft has as it reenters the earths atmosphere