An elevator weighing 400kg is to be lifted up at a constant velocity of 0.6m/s for this purpose a motor of required horse power is used. (g=9.8m/s).(a)What is the acceleration of motor in case of upward motion? (b)What is power of motor?

2 answers

I also don't know answer of this question
constant velocity no acceleration so F = m g

Tension in cable = 400 * 9.80 = 3920 Newtons

power = force * speed = 3020 * 0.6 m/s
= 2352 Newton meters/sec or Watts