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1.7 Energy, work and power

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Question 420

The equation used to find the gravitational potential energy of an object near the Earth's surface can be written as:

Ep=h×Y×Z E_p = h \times Y \times Z Ep​=h×Y×Z

where Ep E_p\,Ep​ is the gravitational potential energy and h h\,h is the height of the object.

Which of the following correctly identifies the quantities Y Y\,Y and ZZZ?

A

Y=massY = \text{mass}Y=mass, Z=gravitational field strengthZ = \text{gravitational field strength}Z=gravitational field strength

B

Y=weightY = \text{weight}Y=weight, Z=heightZ = \text{height}Z=height

C

Y=massY = \text{mass}Y=mass, Z=velocityZ = \text{velocity}Z=velocity

D

Y=densityY = \text{density}Y=density, Z=volumeZ = \text{volume}Z=volume

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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