Other questions in this quiz

2. A 1200kg is being lifted by a crane through a height of 12m. The power supply for the crane is 230 v. the lift takes 15 secconds. -efficiency of the system is 35%. how much work is done ?

  • 12
  • 1200x10x12=144000
  • 10
  • 1200

3. What is the power needed ?

  • 9700
  • 144000
  • 144000*15=9600
  • 678

4. power needed and to do the work?

  • 9600*0.35=27428 w
  • 99999
  • 6789
  • 9876

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