Physics 9702/41 — October/November 2022

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

questions

100

marks

120

minutes

Topics Magnetic Fields · Gravitational Fields · Motion in a Circle · Temperature · Ideal Gases · Oscillations · +7 more

Q1Gravitational FieldsMotion in a CircleFree sample

(a)

State the equation for the gravitational force $F$ between two point masses $m_1$ and $m_2$ that are separated by a distance $r$ . State the meaning of any other symbols you use.

(b)

A satellite is in a circular orbit of radius $R$ around a planet of mass $M$ .

Show that the period $T$ of the orbit is given by

T^2 = kR^3

where $k$ is a constant that depends on the value of $M$ . Explain your reasoning.

(c)

A satellite is in a circular orbit around the Earth with a period of 24 hours.
The mass of the Earth is $6.0 \times 10^{24}\ \text{kg}$ .

(i)

Calculate the radius of the orbit.

radius = ______ $\text{m}$

(ii)

State the two other conditions that must be met for the orbit to be geostationary.

1 ______

2 ______

The rest of this paper

9 more questions

Q2Temperature · Ideal Gases10M
Q3Oscillations11M
Q4Electric Fields12M
Q5Capacitance · Magnetic Fields11M
Q6Magnetic Fields9M
Q7Alternating Currents · Medical Physics10M
Q8Quantum Physics10M
Q9Astronomy and Cosmology8M
Q10Nuclear Physics10M

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