Une statuette pesant 50 N est posée sur une semelle qui a 4 pieds ronds de 2 cm de diamètre. Sachant que la semelle pèse elle-même 15 N , quelle est la pression exercée sur le sol par l ' ensemble ?

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 situation will produce the greatest change of momentum

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?