Respuesta :

musiclover10045
incline of ramp = 10 degrees
rope = 33 degrees

33-10 = 23 degree angle of force

force on the ramp = 80 pounds x cos(23 degrees) = 73.64 pounds of force

work = 73.64 x 20 foot long ramp = 1472.8 = 1473 foot-pounds