19. a 10-kg cart moving at 5 m/s collides with a 5-kg cart at rest and causes it to move 10 m/s. which principle explains the result? o law of unequal forces o law of conservation of momentum o law of accelerated collision o law of differential mass

The desk has a weight of 75 lb and a center of gravity at g. determine the initial acceleration of a desk when the man applies enough force f to overcome the static friction at a and b. also, find the vertical reactions on each of the two legs at a and at b. the coefficients of static and kinetic friction at a and b are ms = 0.5 and mk = 0.2, respectively

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?