Physics 9702/21 — May/June 2021

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

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Topics Dynamics · Forces, Density and Pressure · Work, Energy and Power · Kinematics · Physical Quantities and Units · Waves · +5 more

Q1Forces, Density and PressurePhysical Quantities and UnitsDynamicsFree sample

Answer all the questions in the spaces provided.

(a)

Define density.

(b)

Fig. 1.1

Fig. 1.1 shows a solid pyramid with a square base.

The mass $m$ of the pyramid is given by

m = \frac{1}{3}\rho hx^2

where $\rho$ is the density of the material of the pyramid,
$h$ is the height, and
$x$ is the length of each side of the base.

Measurements are taken as shown in Table 1.1.

Table 1.1

(i)

Calculate the absolute uncertainty in length $x$ .

absolute uncertainty = ______ $\text{cm}$

(ii)

The density $\rho$ is calculated from the measurements in Table 1.1.

Determine the percentage uncertainty in the calculated value of $\rho$ .

percentage uncertainty = ______ $\%$

(c)

The square base of the pyramid in (b) rests on the horizontal surface of a bench.

Use data from Table 1.1 to calculate the average pressure of the pyramid on the surface of the bench. The uncertainty in your answer is not required.

pressure = ______ $\text{Pa}$

The rest of this paper

5 more questions

Q2Work, Energy and Power · Dynamics · Kinematics12M
Q3Kinematics · Dynamics · Work, Energy and Power · Forces, Density and Pressure10M
Q4Waves · Superposition10M
Q5D.C. Circuits · Electricity11M
Q6Particle Physics · Electric Fields10M

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