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1.7 Energy, work and power

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Question 162

An object of mass m m\,m moves with a speed v v\,v and has kinetic energy EEE.

A second object has a different mass and speed.

Which row in the table below indicates that the second object has four times as much kinetic energy?

Mass of the second objectSpeed of the second object
Ais doubledis doubled
Bis halvedis doubled
Cstays the sameis doubled
Dis doubledstays the same
A

Mass is doubled, speed is doubled

B

Mass is halved, speed is doubled

C

Mass stays the same, speed is doubled

D

Mass is doubled, speed stays the same

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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