Aim:
To find out whether momentum and kinetic energy are hold.
Hypothesis:
Theoretically momentum should be conserved at all multiplication whereas energy is lose if the collision is not a to the full elastic one through heat and sound.
Variables:
        The Independent variable is the initial and final mass of the trolley. The Dependent variable is the f number of the trolley.
Procedure:
i) Â Â Â Â Â Â Â Â Set up apparatus as shown in the diagram.
ii) Â Â Â Â Â Â Â Â strike ticker timer and give the trolley a prompt push.
iii) Â Â Â Â Â Â Â Â Drop a book from your hands onto the trolley as it runs beneath.
iv) Â Â Â Â Â Â Â Â Run off enough tapes for each member of your group.
v) Â Â Â Â Â Â Â Â measure the mass of your book and the trolley.
Results:
        mtrolley = 805g ± 10g
mbook = 845g ± 10g
Ticker timer goes at 50Hz = 1/50s = 0.02s
vi = di / ?t                                 vf = d2 / ?t
di = 5.4cm ± 0.1cm                         vi = 0.54ms-1
d2 = 1.8cm ± 0.1cm                         vf = 0.18ms-1
Ek = mv2 / 2
Ek before = 0.117369 J
Ek after = 0.02673 J
Pbefore = Pafter
Pbefore = mv                                         Pbefore = 0.4347 kgms-1
        Pafter = (m + m)v                                 Pafter = 0.
297 kgms-1
Evaluation and Analysis:
        The obtained results dont tin my hypothesis since they show that neither energy nor momentum is conserved in this situation. The momentum after the collision decreased by a agentive role of approx. 1.5 whereas kinetic energy has decreased by almost a factor of 4.5. Due to friction from the give in and the ticker timer the measurements taken were not 100% accurate. clangor was the main cause of inaccuracy in this experiment.
        Kinetic energy is lost in this experiment and has been transformed into heat and sound.
        Another factor contributing...
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