Physics 9702/42 — February/March 2023

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

questions

100

marks

120

minutes

Topics Electric Fields · Gravitational Fields · Motion in a Circle · Ideal Gases · Thermodynamics · Temperature · +8 more

Q1Gravitational FieldsMotion in a CircleElectric FieldsFree sample

(a)

Define gravitational potential at a point.

(b)

Artemis is a spherical planet that may be assumed to be isolated in space. The variation with distance $x$ from the centre of Artemis of the gravitational potential $\phi$ is shown in Fig. 1.1.

Fig. 1.1

(i)

The radius of Artemis is $4800\ \text{km}$ .

Determine the value of $\phi$ on the surface of Artemis.

$\phi$ = ______ $\text{J kg}^{-1}$

(ii)

Show that the mass of Artemis is $2.55 \times 10^{24}\ \text{kg}$ .

(iii)

Calculate the gravitational field strength $g$ on the surface of Artemis.

$g$ = ______ $\text{N kg}^{-1}$

(iv)

A satellite is in an orbit at a fixed position above a point on the surface of Artemis. The satellite is located above the equator of Artemis at a height above the surface where the gravitational potential is $-0.65 \times 10^7\ \text{J kg}^{-1}$ .

Calculate the period, in hours, of rotation of Artemis.

period = ______ $\text{hours}$

(c)

State one similarity and one difference between gravitational potential due to a point mass and electric potential due to a point charge.

similarity ....................................................................................................................................

difference ..................................................................................................................................

The rest of this paper

9 more questions

Q2Ideal Gases · Thermodynamics · Temperature12M
Q3Oscillations10M
Q4Electric Fields12M
Q5Capacitance10M
Q6Magnetic Fields8M
Q7Quantum Physics7M
Q8Nuclear Physics11M
Q9Medical Physics · Alternating Currents9M
Q10Astronomy and Cosmology9M

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