人的重力是:G=mg=60kg×9.8N/kg=588N;人跳一次所做的功是:W=Gh=588N×0.05m=29.4J,故人1min做的功是:W总=29.4J×180=5292J;人的功率是:P= W t = 5292J 60s =88.2W;答:他的重力为588N,1min内他跳绳做的功约为5292J,功率约为88.2W.