A 1300-lb wrecking ball hangs from a 20-ft cable with mass density 11 lb/ft3 attached to a craneCalculate the work done if the crane lifts the ball from the ground level to 20 ft in the air by drawing in the cable.
she will eat when she is hungry, ask your vet before you give her people fiber- their tummy's are alot different than peoples.
A little canned pumpkin with water from canned tuna poured itDo not give your cat any medicine (Benefiber) that is meant for humansCall you vet for advice also.
11 lb/ft3 referring to a cable is a bit confusingI can answer only if I assume it's 11 lb/ft so that the total mass of the cable is 1120 220 lb (but not relevant) When the ball has been lifted a distance of x ft, the length of cable still to be raised is (20-x) ft which has a mass 11(20 - x) lb Hence the total weight to be lifted at this point is (1300 + 11(20-x))g poundal (1520 - 11x)g poundal If x is increased by a small amount dx the work done (in ft poundal) is g(1520 - 11x) dx Hence the total work done in raising the ball through 20 ft is g ∫ (1520 - 11x) dx g(1520x - 11x?/2 from 0 to 20 g(3040 - 2200) 840g From memory, I think the value of g is 32, but I've been metric for 35 years and will have to leave you to fix up the unitsAll the best.
