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1.7 Energy, work and power

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Question 279

A cyclist is riding down a hill. As they descend, they apply the brakes, causing their speed to decrease.

What are the main energy transfers that take place during this descent?

A

gravitational potential+kinetic→thermal\text{gravitational potential} + \text{kinetic} \rightarrow \text{thermal}gravitational potential+kinetic→thermal

B

gravitational potential→kinetic+thermal\text{gravitational potential} \rightarrow \text{kinetic} + \text{thermal}gravitational potential→kinetic+thermal

C

kinetic→gravitational potential+thermal\text{kinetic} \rightarrow \text{gravitational potential} + \text{thermal}kinetic→gravitational potential+thermal

D

thermal→gravitational potential+kinetic\text{thermal} \rightarrow \text{gravitational potential} + \text{kinetic}thermal→gravitational potential+kinetic

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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