energy transfers

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Work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is

Work done by a person having weight 600 N and he needs to climb up a mountain of height 2000 m is
  • A. 1000 kJ
  • B. 1300 kJ
  • C. 1400 kJ
  • D. 1200 kJ
  • Correct Answer: Option D

Efficiency of car engine is only about

Efficiency of car engine is only about
  • A. 10%
  • B. 20%
  • C. 30%
  • D. 80%
  • Correct Answer: Option B