A 4000-lb wrecking ball hangs from a 20-ft cable of density 5 lb/ft attached to a craneCalculate the work done if the crane lifts the ball from ground level to 20 ft in the air by drawing in the cable in ft-lbs.
THROW IT IN THE GARBAGE CAN!!!!!!
jewlery purifier or some form of oxidizer there is stuff on the industry you will locateor only take it to a jewlery shop and function them sparkling it they many times furnish this provider for unfastened as long as you act such as you're finding to purchase some thing.(lol)
Once the 4000-lb ball was lifted 20 ft in the air, there is also 20ft of cable reeled inTotal work is the sum of these two worksWork done on wrecking ball W 4000lb(20ft) 80000 ft-lbs Work done on cable .the first foot of cable is lifted only 1 ft high.W 5lbs x1ft .the 2nd foot of cable is lifted 2ft high.W 5lbs x 2ft .the 3rd foot of cable is lifted 3ft high .w 5lbs x 3ft .etc .until.the 20th foot nearest the wrecking ball W 5lbs x 20ft So the Work done is total Weight of cable times the average distance, which is 20/2 10ft .W 20ft(5lb/ft)(10ft) 1000ft-lbs Total Work 80000 + 1000 81000ft - lbs
