energy work power conclusion

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Energy in relevance to time is related to

Energy in relevance to time is related to
  • A. Efficiency
  • B. Work
  • C. Power
  • D. Force
  • Correct Answer: Option C

A machine is able to lift a mass of 200 kg vertically up to height of 30 m above ground in 50 seconds. power of machine is

A machine is able to lift a mass of 200 kg vertically up to height of 30 m above ground in 50 seconds. power of machine is
  • A. 0.12 kW
  • B. 1.2 kW
  • C. 6.0 kW
  • D. 300 kW
  • Correct Answer: Option B

When a rubber band is compressed, type of energy possessed by rubber is

When a rubber band is compressed, type of energy possessed by rubber is
  • A. Potential Energy
  • B. Thermal Energy
  • C. Kinetic Energy
  • D. Sound Energy
  • Correct Answer: Option A

A car stopped screeching to avoid crash with a van, change is involved in process is

A car stopped screeching to avoid crash with a van, change is involved in process is
  • A. Kinetic energy is converted into sound energy
  • B. Kinetic Energy is converted into sound and thermal energy
  • C. Potential energy is converted into sound, heat and kinetic energy
  • D. Kinetic and potential energy is converted into thermal and sound energy
  • Correct Answer: Option B

SI unit for power is

SI unit for power is
  • A. Joules
  • B. Watts
  • C. Ohms
  • D. Newton
  • Correct Answer: Option B