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PHYSICS
EXPERIMENTS
(MECHANICS)




`In the matter of physics, the first lessons should contain
nothing but what is experimental and interesting to see. A
pretty experiment is in itself often more valuable than twenty
formulae extracted from our minds.' - Albert Einstein




www.psi-net.org




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Page 2

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LEAVING CERTIFICATE PHYSICS
LISTED EXPERIMENTS
CONTENTS

MECHANICS

Measurement of velocity ..................................................................................................... 4
and acceleration .......................................................................... 6
To show that a F.............................................................................................................. 8
Verification of the principle of conservation of momentum ........................................... 10
Measurement of g.............................................................................................................. 12
Verification of Boyle's law ............................................................................................... 14
Investigation of the laws of equilibrium for a…

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NOTE

For examination purposes any valid method will be acceptable for describing a particular
experiment unless the syllabus specifies a particular method in a given case.
Students will be expected to give details of equipment used, assembly of equipment, data
collection, data manipulation including graphs where relevant. Students will also…

Page 4

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MEASUREMENT OF VELOCITY

Apparatus
Ticker timer and tape, suitable low-voltage a.c. power supply, trolley, runway, laboratory
jack or stand.



Ticker tape Ticker timer Trolley
Runway




Procedure
1. Set up the apparatus as in the diagram.
2. Connect the ticker timer to a low-voltage power supply.
3. Give the trolley a…

Page 5

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Notes
Ignore the initial five or six dots on the tape as this shows the initial acceleration due to
the push.

Ticker timers that use precarbonated tape are recommended because the friction due to
paper drag is reduced.

Ensure that the voltage rating of the timer is not exceeded.

Some…

Page 6

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MEASUREMENT OF ACCELERATION

Apparatus
Ticker timer and tape, suitable low-voltage a.c. power supply, dynamics trolley, runway
and laboratory jack or stand.

Ticker tape Ticker timer
Trolley Runway




Procedure
1. Set up the apparatus as in the diagram.
2. Connect the ticker timer to a suitable low-voltage power supply.
3. Allow…

Page 7

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Results
s1/m t1/s u/m s-1 s2/m t2/s v/m s-1 t/s a/m s-2




Notes
Ignore the initial five or six dots on the tape since the trolley may not be moving with
constant acceleration during this time interval.

Ticker timers that use precarbonated tape are recommended because the friction due to…

Page 8

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TO SHOW THAT a F

Apparatus
Air-track with one vehicle, pulley and blower, two photogates, two retort stands, dual
timer, metre-stick, black card, set of slotted weights (1 N total).




Dual timer
t1 t2
Photogate



l Pulley
Light beam Card

Slotted
weights

s
Air track




Procedure
1. Set up the…

Page 9

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Results
l = .......... m.

s = .......... m.

l
Initial velocity u =
t1

l
Final velocity v =
t2

v2 - u2
Acceleration a =
2s

F/N t1/s t2 /s u/m s-1 v/m s-1 a/m s-2
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1


Conclusion
A…

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VERIFICATION OF THE PRINCIPLE OF CONSERVATION OF
MOMENTUM

Apparatus
Linear air-track, two vehicles with velcro pads attached, blower, two photogates, two
retort stands, dual timer, metre-stick, black card.



Dual timer
t1 t2
Photogate

Light beam
l Card




Air track

Vehicle 1 Velcro pad Vehicle 2



Procedure
1. Set up apparatus…

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