WORK, ENERGY & POWER(MCQs)(IGCSE 0625 CLASSIFIED WORKSHEET WITH ANSWERS

Worksheet contains 87 MCQs from the past 10 years past papers.
Identify changes in kinetic, gravitational potential, chemical, elastic (strain), nuclear and internal energy that have occurred as a result of an event or process

• Recognise that energy is transferred during events and processes, including examples of transfer by forces (mechanical working), by electrical currents (electrical working), by heating and by waves
• Recall and use the expressions kinetic energy = ½mv^ 2 and change in gravitational potential energy = mg∆h
• Understanding of different forms of energies and conversion between them
  – chemical energy stored in fuel
  – water, including the energy stored in waves,in tides, and in water behind hydroelectric dams
  – geothermal resources
  – nuclear fission
  – heat and light from the Sun (solar cells and
  panels)
  – wind
  Recall and use the equations:
  efficiency =( useful energy output/ energy input ) × 100%
  efficiency=( useful power output /power input) × 100%
  Demonstrate understanding that
  work done = energy transferred
  • Relate (without calculation) work done to the magnitude of a force and the distance moved in the direction of the force
  Recall and use W = Fd = ∆E