quiz

Work Energy and Power

1. Work is defined as the product of which two quantities?

  • A) Force and displacement
  • B) Mass and velocity
  • C) Time and distance
  • D) Acceleration and momentum
A) Force and displacement Explanation

2. What is the SI unit of work?

  • A) Newton (N)
  • B) Watt (W)
  • C) Joule (J)
  • D) Kilogram (kg)
C) Joule (J) Explanation

3. If the force and displacement are in opposite directions, then the work done is:

  • A) Positive
  • B) Negative
  • C) Zero
  • D) None of these
B) Negative Explanation

4. If an object is thrown horizontally, the work done by the gravitational force is:

  • A) Positive
  • B) Negative
  • C) Zero
  • D) Cannot Determine
C) Zero Explanation

5. What is the equivalent of one joule in foot pounds?

  • A) 0.07376 ft-lbs
  • B) 1.000 ft-lbs
  • C) 0.333 ft-lbs
  • D) 2.204 ft-lbs
A) 0.07376 ft-lbs Explanation

6. What is the capacity for doing work known as in physics?

  • A) Force
  • B) Energy
  • C) Power
  • D) Momentum
B) Energy Explanation

7. What principle states that energy can be neither created nor destroyed but only changed from one form to another?

  • A) Law of Motion
  • B) Law of Thermodynamics
  • C) Conservation of Energy
  • D) Second Law of Thermodynamics
C) Conservation of Energy Explanation

8. What is the common form of energy associated with the motion of an object?

  • A) Nuclear energy
  • B) Kinetic energy
  • C) Potential energy
  • D) Chemical energy
B) Kinetic energy Explanation

9. In the International System of Units (SI), what is the unit of measurement for energy?

  • A) Watt
  • B) Newton
  • C) Joule
  • D) Kilogram
C) Joule Explanation

10. Which symbol represents power in physics?

  • A) W
  • B) P
  • C) F
  • D) E
B) P Explanation

11. What is an erg?

  • A) A unit of power
  • B) A unit of pressure
  • C) A unit of force
  • D) A unit of energy
D) A unit of energy Explanation

12. What is the potential energy that binds quarks to form hadrons called?

  • A) Nuclear energy
  • B) Elastic energy
  • C) Chromodynamic energy
  • D) Electrical energy
C) Chromodynamic energy Explanation

13. Which is the unit of power traditionally used to measure the power of engines and machines?

  • A) Joule
  • B) Horsepower
  • C) Watt
  • D) Kilowatt-hour
B) Horsepower Explanation

14. What is the approximate rotational energy of Earth in joules?

  • A) 1.35 × 1029J
  • B) 2.14 × 1029J
  • C) 3.78 × 1029J
  • D) 5.62 × 1029J
B) 2.14 × 1029J Explanation

15. What is a calorie (cal)?

  • A) A unit of mass
  • B) A unit of temperature
  • C) A unit of energy
  • D) A unit of volume
C) A unit of energy Explanation

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