Question

Car of mass 2000 kg is lifted up a distance of 30 by a crane in 1 minute.. second crane does the same job in 2 minutes.... what is the power applied by each crane ???

Answer 1

Answer:

Mass of car = 20000 kg

force= 20000 kgf =2000N

distance = 30m

time taken by first crane= 1 min= 60s

tine taken by second crane = 2 min= 120s

Power supplied by first crane = (2000*30)/60

= 60000/60

=1000W

power supplied by second crane = 60000/120

=500W

Answer 2

Answer:

Refer to the attachment...

hope it helps..