A car of mass 2000 kg is lifted up a distance of 30 m by a crane is 1 min. A second crane does the same job in 2 min. do the cranes consume the same or different amounts of fuel? What is the power supplied by each crane? Neglect Power dissipation against friction.

A car of mass 2000 kg is lifted up a distance of 30 m by a crane is 1

1.	A car of mass 2000 kg is lifted up a distance of 30 m by a crane is 1 min. A second crane does the same job in 2 min. do the cranes consume the same or different amounts of fuel? What is the power supplied by each crane? Neglect Power dissipation against friction.
Answer» Solution :`t_(1)=1` MIN =60s, `t_(2)=` min =120s `W=F_(s)=mgs=5.88xx10^(5)J` As both CRANES same AMOUNT of work so both consume same amount of fuel. `P_(1)=W/(t_(1))` and `P_(1)=W/(t_(2))` `:.P_(1)=9800W ` & `P_(2)=4900W`.