a girl lifts a 160-N load to a height of 1m in 0.5s.
how much power is used to lift the load?
32w
160w
320w
80w

Question

a girl lifts a 160-N load to a height of 1m in 0.5s.
how much power is used to lift the load?
32w
160w
320w
80w

anonymous · Answer

force applied(F) = 160 N
distance (d) = 1m
now, woek done by the girl (W)= F * d
                                             = 160 * 1m
                                             160 joule
we have, time (t) = 0.5 sec
therefore, power (P) = w/t
                               =160/0.5
                              = 320 watt
so,320 watt is your correct answer.