Physics 9702/42 — October/November 2016

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

questions

100

marks

120

minutes

Topics Magnetic Fields · Medical Physics · Electric Fields · Alternating Currents · Gravitational Fields · Ideal Gases · +6 more

Q1Gravitational FieldsFree sample

Answer all the questions in the spaces provided.

(a)

Define gravitational field strength.

(b)

The nearest star to the Sun is Proxima Centauri.
This star has a mass of $2.5 \times 10^{29}\ \text{kg}$ and is a distance of $4.0 \times 10^{13}\ \text{km}$ from the Sun.
The Sun has a mass of $2.0 \times 10^{30}\ \text{kg}$ .

(i)

State why Proxima Centauri may be assumed to be a point mass when viewed from the Sun.

(ii)

Calculate

the gravitational field strength due to Proxima Centauri at a distance of $4.0 \times 10^{13}\ \text{km}$ ,

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

the gravitational force of attraction between the Sun and Proxima Centauri.

force = ______ $\text{N}$

(c)

Suggest quantitatively why it may be assumed that the Sun is isolated in space from other stars.

The rest of this paper

13 more questions

Q2Ideal Gases8M
Q3Thermodynamics8M
Q4Oscillations8M
Q5Medical Physics6M
Q6Electric Fields8M
Q7Capacitance · Electric Fields8M
Q8Electronics5M
Q9Magnetic Fields · Alternating Currents7M
Q10Magnetic Fields4M
Q11Magnetic Fields · Alternating Currents7M
Q12Quantum Physics9M
Q13Medical Physics6M
Q14Nuclear Physics8M

Loading the full paper…