Aprojectile is shot directly away from earth's surface. neglect the rotation of the earth.
what multiple of earth's radius re gives the radial distance (from the earth's center) the projectile reaches if
(a) its initial speed is 0.351 of the escape speed from earth and
(b) its initial kinetic energy is 0.351 of the kinetic energy required to escape earth? (give your answers as unitless numbers.)
(c) what is the least initial mechanical energy required at launch if the projectile is to escape earth?

You and a friend (alex) are at a a tree-top adventure park .. . part of the course requires you to climb up a rope. you both climb the same rope in the same amount of time. however, the tension in the rope is greater when alex climbs. who did the most work? alex did - more tension means more force - more force means more work was done you did - less tension means less force - less force means more work was done to find the work done, the force exerted and distance moved are multiplied. a couch is moved twice before you are happy with its placement. the same force was used to move the couch both times. if more work is done the first time it is moved, what do you know about the distance it was moved? when more work was done, the couch was moved less. when more work was done, the couch was moved further. when more work was done, the couch wasn't moved at all. when more work was done, the couch was moved the same distance.

Which transition by an electron will release the greatest amount of energy? oa ob oc od

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)