A2 Physics Practical and Experiments for Unit 6B/Unit 8

This is the lists of experiments in Physics unit 6, and the attached resource contains it all!

Practical 1 Momentum and momentum conservation - large trolleys

Practical 2 Momentum and momentum conservation - small trolleys

Practical 3 Momentum and momentum conservation using a linear air track
Practical 4 Rate of change of momentum using a linear air track
Practical 5 Rate of change of momentum using a trolley
Practical 6 Centripetal force - whirling bung
Practical 7 Centripetal force - rotating trolley
Practical 8 Measuring the charge stored by a capacitor
Practical 9 Effect of length and current on the force on a wire in a magnetic field
Practical 10 Specific heat capacity of a liquid
Practical 11 Specific heat capacity of a solid
Practical 12 The relationship between the pressure and temperature of a gas
Practical 13 The relationship between the pressure and volume of a gas
Practical 14 Measurement of the activity of a radioactive source
Practical 15 Simulation of radioactive decay
Practical 16 Graphical representation of simple harmonic motion
Practical 17 Forced oscillations
Practical 18 Investigating damped oscillations

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Student 1 of 2
Practical 1 Momentum and momentum conservation ­ large
trolleys
Purpose Safety
The aim of this experiment is to study momentum Lift the large wooden runway with care.
and its conservation in an inelastic collision. Set up the experiment away from the edges of
the bench so that the trolleys do not fall off.
You will need:
· Two trolleys · Plasticene®
· Two light gates and suitable interface · Drawing pin
· Eight 100g slotted masses · Adhesive tape
· Wooden runway · Means of tilting the runway
light gate 1 light gate 2
Plasticene®
trolley A trolley B
Figure 1: Arrangement of large trolleys to investigate momentum and momentum conservation
Experimental instructions
Set up the apparatus as shown in the diagram with five slotted masses fixed onto trolley A.
Compensate for friction by tilting the runway slightly. Check by giving one trolley a small
push and confirming that it runs down the runway with constant speed.
Soften the Plasticene® and stick it to the front of one of the trolleys. Fix the drawing pin to
the front of the other trolley with the adhesive tape, so it is facing out from the trolley as
shown. Put the two light gates quite close together. This is to minimise the effects of friction
as the trolleys collide.
Set the interface unit to record the speed of trolley A before the collision and the speed of the
two trolleys (A and B joined together) after the collision.
Put trolley A at one end of the runway and trolley B just before light gate 2.
Give trolley A a push (not too large) so that it runs down the track, cutting through the light
beam of light gate 1 and colliding with, and sticking to, trolley B. The two trolleys will now
travel on, the mask on trolley A cutting through the light beam of light gate 2.
Repeat the experiment for differing initial speeds and trolley masses. Do not allow the
trolleys to fall off the bench.
1

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Page 2

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Student
Practical 1 (cont.) Momentum and momentum conservation ­ large
trolleys
Analysis and conclusions
Use your results to test the law of conservation of momentum.
Calculate the total momentum of both trolleys before and after the collision.
Comment on the most important sources of error in your experiment and how they might

Page 3

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Student 1 of 1
Practical 2 Momentum and momentum conservation ­ small
trolleys
Purpose Safety
The aim of this experiment is to study momentum Lift the wooden support board with care.
and its conservation in an inelastic collision.…read more

Page 4

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Student
Practical 3 Momentum and momentum conservation using a
linear air track
Purpose
The aim of this experiment is to study momentum and its conservation in an inelastic collision
between two riders using a linear air track.…read more

Page 5

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Student 2 of 2
Practical 3 (cont.) Momentum and momentum conservation using a
linear air track
Analysis and conclusions
Calculate the total momentum of both riders before and after the collision. Use your results
to test the law of conservation of momentum.
Comment on the most important sources of error in your experiment and how they might

Page 6

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Student
Practical 4 Rate of change of momentum using a linear air track
Purpose
The aim of this experiment is to investigate rate of change of momentum using a linear air track.…read more

Page 7

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Student 2 of 2
Practical 4 (cont.) Rate of change of momentum using a linear air
track
Vary the accelerating force but keep the total mass constant by putting masses on the rider
if they are removed from the hanger and vice versa. Record the values of accelerating
force, velocity and momentum values at gates 1 and 2, the momentum change and the time
between the light gates in a table.
Analysis and conclusions
Calculate the rate of change of momentum for each accelerating force.…read more

Page 8

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Student
Practical 5 Rate of change of momentum using a trolley
Purpose
The aim of this experiment is to investigate rate of change of momentum using a trolley on a

Page 9

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Student 2 of 2
Practical 5 (cont.) Rate of change of momentum using a trolley
Repeat the procedure by taking one washer off the trolley and adding it to the suspended
washers ­ the accelerating force is now 0.3N (same total mass). Carry on until you have
only two washers left on the trolley. Record the values of accelerating force, velocity and
momentum values at gates 1 and 2, the momentum change and the time between the light

Page 10

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Student
Practical 6 Centripetal force ­ whirling bung
Purpose Safety
The aim of this experiment is to verify the Do not swing the bungs round too fast and avoid
equation for centripetal force using a whirling collisions between bungs and people!
bung. Keep away from windows.
Wear eye protection.
You will need:
· Rubber bung with a hole through it · Stopwatch or stop clock · Access to a balance

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