(a)

Find the useful power output (in W) of an elevator motor that lifts a 2300 kg load a height of 40.0 m in 12.0 s, if it also increases the speed from rest to 4.00 m/s. Note that the total mass of the counterbalanced system is 10,000 kgso that only 2300 kg is raised in height, but the full 10,000 kg is accelerated. (Enter a number.)

2 attempts left INCORRECT 169733W

INCORRECT 333,333.33 W

(b)

What does it cost (in cents), if electricity is $0.0900 per kW h? (Enter a number.) cents