Answer soon! dan does 188.0 j of work raking leaves. if the rake does 128.0 j of work, what is the efficiency of the rake? a. 68.1 percent b. 147.0 percent c. 60.0 percent d. 316.0 percenta force of 29.0 n is used to lift a baby through a distance of 0.500 m. how much work is done on the baby? a. 29.5 j b. 58.0 j c. 14.5 j d. 28.5 j

The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .