Free help with homework

Why join Brainly?

  • ask questions about your assignment
  • get answers with explanations
  • find similar questions

A crane operated by an electric motor has a mass of 500 kg. It raises a load of 300 kg vertically at a steady speed of 0.2 ms − 1. Assume resistance to be

constant at 1200 N. What is the power required to raise the load?


Here, you are given too much information and you don't need all. You can use a simple formula for power to calculate. You don't need the masses of crane or object.

P = F.v

here, F is the resistance force, F= 1200N
v is the velocity at which the mass is moving, v = 0.2 m/s

So power = 1200 × 0.2 = 240 W

0 0 0
The Brain
  • The Brain
  • Helper
Not sure about the answer?
Learn more with Brainly!
Having trouble with your homework?
Get free help!
  • 80% of questions are answered in under 10 minutes
  • Answers come with explanations, so that you can learn
  • Answer quality is ensured by our experts