Traditional Culture Encyclopedia - Photography and portraiture - Pukou Wharf Photography Club Tel
Pukou Wharf Photography Club Tel
( 1)G = mg = 65× 1000kg× 10N/kg = 6.5× 105n；
(2)W = Gh = 6.5× 105n×20m = 1.3× 107j；
p = Wt = 1.3× 107 j200s = 6.5× 104 w；
Answer: (1) The gravity of the cargo is 6.5×105n; n；
(2) The work done by the bridge crane on the goods is 1.3× 107J, and the power is 6.5× 104W. ..
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