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1.7 Energy, work and power

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Question 350

An object is dropped from a cliff and falls through the air, accelerating downwards. What best describes the change in energy stores?

A

kinetic energy→gravitational potential energy+internal energy\text{kinetic energy} \rightarrow \text{gravitational potential energy} + \text{internal energy}kinetic energy→gravitational potential energy+internal energy

B

gravitational potential energy→kinetic energy+internal energy\text{gravitational potential energy} \rightarrow \text{kinetic energy} + \text{internal energy}gravitational potential energy→kinetic energy+internal energy

C

gravitational potential energy+kinetic energy→internal energy\text{gravitational potential energy} + \text{kinetic energy} \rightarrow \text{internal energy}gravitational potential energy+kinetic energy→internal energy

D

kinetic energy→internal energy+gravitational potential energy\text{kinetic energy} \rightarrow \text{internal energy} + \text{gravitational potential energy}kinetic energy→internal energy+gravitational potential energy

Markscheme

1.7 Energy, work and power Questions

  1. IGCSE
  2. /Physics
  3. /1.7 Energy, work and power

533 exam-style questions on CIE IGCSE Physics 1.7 Energy, work and power, covering 1.7.1a Energy stores and energy transfers, 1.7.1b Conservation of energy, 1.7.1c Kinetic and gravitational potential energy, 1.7.2 Work done, 1.7.3 Energy resources, 1.7.3a Energy resources and electricity generation, 1.7.3b Nuclear fusion as an energy source, 1.7.3c Efficiency of energy transfer, and 1.7.4 Power. Each one has a worked solution and a mark scheme showing where the marks go.

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