Quiz  /  Work Power and Energy Class 11 MCQ Questions With Answers

  • 1. 
    Energy from a compressed spring would be an example of...

  • kinetic
  • elastic
  • gravitational
  • chemical

  • 2. 
    When a rollercoaster cart moves towards the ground, what happens to the PE that it has?

  • It transforms into KE
  • It leaves the system
  • Nothing
  • It stays PE

  • 3. 
    In order for work to be done, what must be true?

  • Force acts in the same direction as the distance traveled.
  • Force and distance are in opposite directions.
  • Force is greater than distance.
  • Distance is greater than force.

  • 4. 
    Based on the formula for potential energy, what 2 variables influence PE the most?

  • mass and height
  • mass and velocity
  • velocity and height
  • velocity and mass

  • 5. 
    What is kinetic energy?

  • stored energy
  • energy of motion
  • energy of friction
  • energy stored in chemical bonds

  • 6. 
    The Law of Conservation of Energy states that total amount of energy in a closed system will always

  • stay the same
  • increase
  • decrease
  • cannot be determined

  • 7. 
    How do we express the total amount of energy a moving object has?

  • KE x PE
  • KE + PE
  • KE - PE
  • KE / PE

  • 8. 
    In which situation is NO work done?

  • picking up a book bag
  • dropping the bookbag
  • carrying the bookbag
  • none of these

  • 9. 
    What has to happen when a force is exerted on an object for work to be done?

  • the object moves
  • the object stays still
  • the object is heavy
  • none of these

  • 10. 
    What is the formula for Kinetic Energy?

  • PE = m*g*h
  • KE = 1/2m*v2
  • W = F*d
  • P = W/t

  • 11. 
    When you carry an object, is work done on it?

  • Yes, force is applied in the same direction as the distance it travels.
  • No, force is applied in a different direction than distance traveled.

  • 12. 
    The SI unit of work is?

  • Joules
  • Watts
  • Newtons
  • meters

  • 13. 
    If 150 Joules of work is needed to move a box 10 meters, what force was used?

  • 1500 N
  • 15 N
  • 1.5 N
  • 150 N

  • 14. 
    What is the kinetic energy of a ball sitting on top of a hill?

  • 0 J
  • less than 0 J
  • more than 0 J

  • 15. 
    Why does the total amount of mechanical energy stay constant in a system?

  • energy is not created or destroyed
  • energy leaves
  • energy enters
  • energy is not converted from one form into another

  • 16. 
    What is being transferred as you do work?

  • Energy
  • Heat
  • Power
  • Gravitational Potential Energy

  • 17. 
    What is the formula for calculating the total amount of mechanical energy?

  • ME = KE + PE
  • KE = ME + PE
  • PE = KE + ME
  • ME = 1/2 mv2

  • 18. 
    When a roller coaster cart falls towards the ground, what happens to its potential energy?

  • Increases
  • Decreases
  • Stays the same
  • Nothing

  • 19. 
    What type of energy represents the sum of the KE and PE that a moving object has?

  • chemical energy
  • total mechanical energy
  • electromagnetic energy
  • electrical energy

  • 20. 
    Gravitational potential energy depends on the ________ and ________ of the object.

  • Height and mass
  • Friction and movement
  • Mass and Movement
  • Height and Friction

  • 21. 
    How do you calculate power?

  • P = W/t
  • P = E/t
  • P = w * t
  • P = bbq/chicken
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