which of the following has the greatest power
A) A weight lifts that lifts as 250N weight 2.1mm 2sec
B) A mechanic's lifts that raises a 1.2×10000 N car 2.1m in 12 sec
c ) A car Engine that does 1.2 × 1000J work in 5sec
D) A crane that lifts a 2.5 × 10000 N beam at a speed of 1.2 m/s
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