Work and Energy
Physics ⇒ Mechanics
Work and Energy starts at 8 and continues till grade 12.
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See sample questions for grade 12
Define a conservative force and give one example.
Describe the principle of conservation of mechanical energy with an example.
Explain the difference between kinetic energy and potential energy.
Explain why no work is done when you carry a bag horizontally at constant speed.
State the law of conservation of energy.
Which of the following is a non-conservative force? (1) Gravitational force (2) Electrostatic force (3) Frictional force (4) Spring force
Which of the following is NOT a form of mechanical energy? (1) Kinetic energy (2) Potential energy (3) Chemical energy (4) Elastic energy
Which of the following is the correct expression for kinetic energy? (1) mgh (2) (1/2)mv² (3) Fd (4) kx²
Which of the following is the correct SI unit of work? (1) Joule (2) Newton (3) Watt (4) Pascal
Fill in the blank: The area under a force-displacement graph represents __________.
Fill in the blank: The energy possessed by a body due to its motion is called __________ energy.
Fill in the blank: The rate at which work is done is called __________.
Is it possible for the work done by a force on an object to be zero even if the object is moving?
Is the work done by a centripetal force on a particle moving in a circle zero?
State whether the following statement is true or false: Energy can be transformed from one form to another, but the total energy remains constant in an isolated system.
True or False: The total mechanical energy of a system is always conserved if only conservative forces are acting.
