Physics 5054/21 — May/June 2016

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

questions

marks

105

minutes

Topics Forces · Mass, Weight and Density · Thermal Properties of Matter · General Properties of Waves · Electric Circuits · Physical Quantities and Measurement · +11 more

Q1ForcesFree sample

A sky-diver jumps from a stationary balloon. His initial downwards acceleration is $10\text{ m / s}^2$ .

Fig. 1.1 shows the directions of the air resistance and the weight of the sky-diver.

Fig. 1.1

The mass of the sky-diver is $60\text{ kg}$ and his weight is $600\text{ N}$ .

(a)

Explain, using ideas about the forces, why his initial downwards acceleration is $10\text{ m / s}^2$ .

(b)

When the parachute opens, the sky-diver experiences an upward acceleration for a short time.

Explain why.

(c)

The total force of air resistance on the sky-diver and open parachute changes with their speed, as shown in Fig. 1.2.

Fig. 1.2

After the parachute opens, the sky-diver slows down to a terminal velocity.

The weight of the sky-diver is $600\text{ N}$ .

(i)

Using Fig. 1.2, determine the terminal velocity of the sky-diver.

terminal velocity = ______

(ii)

Calculate the resultant force on the sky-diver when his speed is $5.5\text{ m / s}$ .

resultant force = ______

The rest of this paper

11 more questions

Q2Forces · Mass, Weight and Density5M
Q3Mass, Weight and Density · Physical Quantities and Measurement6M
Q4Thermal Properties of Matter · [Legacy] Temperature and Thermometry4M
Q5General Properties of Waves4M
Q6Reflection and Refraction of Light7M
Q7Magnetic Effect of a Current and the d.c. Motor · General Properties of Waves6M
Q8Electric Circuits4M
Q9Uses of an Oscilloscope · Current, Voltage and Resistance · Electric Circuits8M
Q10Thermal Properties of Matter · Transfer of Thermal Energy15M
Q11Electromagnetic Induction and Transformers · Practical Electricity15M
Q12Energy, Work and Power · Kinematics · Forces · Pressure15M

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