Physics 5054/21 — October/November 2017

Cambridge O-Level · Theory · worked solutions for every part, with the mark scheme

questions

marks

105

minutes

Topics Kinetic Particle Model of Matter · Thermal Properties of Matter · Mass, Weight and Density · Turning Effect of Forces · Pressure · [Legacy] Temperature and Thermometry · +15 more

Q1Mass, Weight and DensityTurning Effect of ForcesFree sample

Fig. 1.1 shows a painter standing on a wooden plank, directly above the right-hand support.

Fig. 1.1

The plank has length $3.6\text{ m}$ , width $0.35\text{ m}$ and thickness $0.025\text{ m}$ .

The gravitational field strength $g$ is $10\text{ N / kg}$ and the mass of the plank is $23\text{ kg}$ .

(a)

Calculate the density of the wood from which the plank is made.

density = ______

(b)

The centre of mass of the plank is in the middle of the plank at a distance of $1.3\text{ m}$ from each of the supports.

Calculate

(i)

the weight of the plank,

weight = ______

(ii)

the moment of the plank about the right-hand support.

moment = ______

(c)

The painter moves further to the right along the plank and the plank rotates about the right-hand support.

Explain why the plank rotates.

The rest of this paper

10 more questions

Q2Pressure · Kinetic Particle Model of Matter6M
Q3Kinetic Particle Model of Matter · Thermal Properties of Matter6M
Q4[Legacy] Temperature and Thermometry · Thermal Properties of Matter5M
Q5Sound5M
Q6[Legacy] Introductory Electronics · Uses of an Oscilloscope · [Legacy] Electronic Systems8M
Q7Magnetic Effect of a Current and the d.c. Motor5M
Q8Radioactivity8M
Q9Energy, Work and Power · Forces · Kinematics15M
Q10Electromagnetic Spectrum · General Properties of Waves · Reflection and Refraction of Light15M
Q11Static Electricity · Electric Circuits · Current, Voltage and Resistance15M

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