9702/42

Physics 9702/42February/March 2018

Cambridge A-Level · A Level Structured Questions · worked solutions for every part, with the mark scheme

13
questions
100
marks
120
minutes

Topics Magnetic Fields · Oscillations · Nuclear Physics · Medical Physics · Communication · Gravitational Fields · +7 more

Q1Gravitational FieldsMotion in a CircleFree sample

Answer all the questions in the spaces provided.

(a)
(i)

State what is meant by a line of force in a gravitational field.

1M
(ii)

By reference to the pattern of the lines of gravitational force near to the surface of the Earth, explain why the acceleration of free fall near to the Earth’s surface is approximately constant.

3M
(b)

The Moon may be considered to be a uniform sphere that is isolated in space. It has radius 1.74×103 km1.74 \times 10^{3}\ \text{km} and mass 7.35×1022 kg7.35 \times 10^{22}\ \text{kg}.

(i)

Calculate the gravitational field strength at the Moon’s surface.

gravitational field strength = ______ N kg1\text{N kg}^{-1}

2M
(ii)

A satellite is in a circular orbit about the Moon at a height of 320 km320\ \text{km} above its surface.

Calculate the time for the satellite to complete one orbit of the Moon.

time = ______ s\text{s}

3M

The rest of this paper

12 more questions
  • Q2Ideal Gases · Thermodynamics10M
  • Q3Oscillations · Magnetic Fields · Alternating Currents · Nuclear Physics8M
  • Q4Oscillations5M
  • Q5Medical Physics10M
  • Q6Communication6M
  • Q7Electric Fields9M
  • Q8Electronics7M
  • Q9Magnetic Fields7M
  • Q10Magnetic Fields8M
  • Q11Quantum Physics7M
  • Q12Medical Physics · Communication6M
  • Q13Nuclear Physics8M
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