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 ?

  • 1200
  • 10
  • 1200x10x12=144000
  • 12

3. current?

  • 987
  • 77777
  • 27428*230=119
  • 789

4. What is the power needed ?

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

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