Physics 9702/22 — October/November 2014

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

questions

marks

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Topics Deformation of Solids · Waves · Dynamics · Work, Energy and Power · Forces, Density and Pressure · Physical Quantities and Units · +6 more

Q1Deformation of SolidsWavesPhysical Quantities and UnitsDynamicsFree sample

Answer all the questions in the spaces provided.

(a)

The Young modulus of the metal of a wire is $1.8 \times 10^{11}\ \text{Pa}$ . The wire is extended and the strain produced is $8.2 \times 10^{-4}$ .
Calculate the stress in GPa.

$\text{stress}$ = ______ $\text{GPa}$

(b)

An electromagnetic wave has frequency $12\ \text{THz}$ .

(i)

Calculate the wavelength in $\mu\text{m}$ .

$\text{wavelength}$ = ______ $\mu\text{m}$

(ii)

State the name of the region of the electromagnetic spectrum for this frequency.

(c)

An object B is on a horizontal surface. Two forces act on B in this horizontal plane. A vector diagram for these forces is shown to scale in Fig. 1.1.

Fig. 1.1

A force of $7.5\ \text{N}$ towards north and a force of $2.5\ \text{N}$ from $30^{\circ}$ north of east act on B. The mass of B is $750\ \text{g}$ .

(i)

On Fig. 1.1, draw an arrow to show the approximate direction of the resultant of these two forces.

(ii)

Show that the magnitude of the resultant force on B is $6.6\ \text{N}$ .
Calculate the magnitude of the acceleration of B produced by this resultant force.

$\text{magnitude}$ = ______ $\text{m s}^{-2}$

(iii)

Determine the angle between the direction of the acceleration and the direction of the $7.5\ \text{N}$ force.

$\text{angle}$ = ______ $^{\circ}$

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6 more questions

Q2Kinematics · Work, Energy and Power12M
Q3Electric Fields · Forces, Density and Pressure · Dynamics9M
Q4Forces, Density and Pressure · Deformation of Solids7M
Q5D.C. Circuits · Electricity11M
Q6Waves · Superposition7M
Q7Particle Physics · Work, Energy and Power4M

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