A 30-m cable of density 3 kg/m hangs vertically from a crane. Answer the questions below using that g= 9.8 m/s². (a) How much work is to required to wind up the entire cable? Work = (b) Suppose a 400-kg wrecking ball is attached to the end of the cable. How much work is done in lifing the ball from ground level to 30 m in the air by winding up the cable? Work = C J.
A 30-m cable of density 3 kg/m hangs vertically from a crane. Answer the questions below using that g= 9.8 m/s². (a) How much work is to required to wind up the entire cable? Work = (b) Suppose a 400-kg wrecking ball is attached to the end of the cable. How much work is done in lifing the ball from ground level to 30 m in the air by winding up the cable? Work = C J.
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Transcribed Image Text:A 30-m cable of density 3 kg/m hangs vertically from a crane. Answer the questions below using that g =
9.8 m/s².
(a) How much work to required to wind up the entire cable?
Work =
AJ.
(b) Suppose a 400-kg wrecking ball is attached to the end of the cable. How much work is done in lifing
the ball from ground level to 30 m in the air by winding up the cable?
Work=
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