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

Explanation

`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`.