Physics 5054/21 — May/June 2010

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

questions

marks

105

minutes

Topics Forces · Energy, Work and Power · Electric Circuits · Current, Voltage and Resistance · Kinematics · General Properties of Waves · +10 more

Q1ForcesKinematicsFree sample

Fig. 1.1 shows the speed-time graph of a ball. The ball is dropped at time $t = 0$ .

Fig. 1.1

(a)

After $t = 0.20\text{ s}$ , the ball falls at a constant speed.

Explain, using ideas about forces, why the speed of the ball is constant after time $t = 0.20\text{ s}$ .

(b)

At $t = 0$ , a different ball is dropped from rest. Until $t = 0.20\text{ s}$ , this ball has a constant acceleration equal to the acceleration of free-fall. After $t = 0.20\text{ s}$ , its acceleration decreases.

(i)

State the value of the acceleration of free-fall.

(ii)

Determine the speed of the second ball at $t = 0.20\text{ s}$ .

speed = ______

(iii)

On Fig. 1.1, draw the speed-time graph for the second ball from $t = 0$ to $t = 0.28\text{ s}$ .

The rest of this paper

10 more questions

Q2Forces5M
Q3Energy, Work and Power · Forces8M
Q4General Properties of Waves5M
Q5Lenses and Dispersion · Reflection and Refraction of Light5M
Q6Electric Circuits · Current, Voltage and Resistance5M
Q7Current, Voltage and Resistance · Electric Circuits · [Legacy] Introductory Electronics5M
Q8Electromagnetic Induction and Transformers6M
Q9[Legacy] Temperature and Thermometry · Energy, Work and Power · Thermal Properties of Matter15M
Q10Pressure · Turning Effect of Forces · Kinetic Particle Model of Matter15M
Q11Radioactivity15M

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