Froghoppers may be the insect jumping champs. these 6-mm-long bugs can spring 70 cm into the air, about the same distance as the flea. but the froghopper is 60 times more massive than a 12-mg flea. the froghopper pushes off for about 4 mm.

part a: what average force does it exert on the surface?
part b: compare this to the gravitational force that earth exerts on the big.
a) this is about 176 times less than the weight of the froghopper. b) this is about 176 times the weight of the froghopper. c) this is equal the weight of the froghopper.

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 is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Which compound is held together by the electrostatic force between two ions? a. co2 b. cci4 c. h2s d. mgf2