Tuesday, 4 June 2013

M3 S1 Core Science Project

Project Title: Measuring gravitational acceleration from simple pendulum motion(S.H.M.)

Background: 

    A Simple Harmonic Motion (S.H.M.) is a periodic general plane motion in which restoring force is proportional to displacement.

x = Acos(wt)
v = dx/dt = -wAsin(wt)
a = dv/dt = -(w^2)Acos(wt)
w = 2(PI)f = 2(PI)/T = sqrt(k/m) for spring with mass = sqrt(g/l) for simple pendulum motion 


Procedure:
    Swing a mass modeling simple pendulum with different length between pivot and C.M. starting from 50 cm to 100 cm with increasing length of 10 cm a time.
    Count the time taken to swing 10, 20, and 50 times, consecutively, then, calculate period (in second).
    Plot the graph of Length (m) against square of Period (s2), find the slope then calculate for g.
    Compare the g measured from this experiment to g from calculation.
 

Sunday, 25 November 2012

25 Nov 2012
    Breakfast : Brown Rice + Deep Fried Pork + Canned Tuna
    Lunch      : Rice + Cheese Wanton + Tonkatsu (Japanese Fried Pork) w/ Cheese + Soup
    Dinner     : Dumpling + Papaya (Is this a match?)
26 Nov 2012
    Breakfast : Brown Rice + Pork's Liver + Baby Corn + Broccoli + Fried Egg w/ Ham
15 Dec 2012
    Breakfast : Fried brown rice with fried eggs
16 Dec 2012
    Breakfast : Spaghetti w/ Cabonara
17 Dec 2012
    Breakfast : Brown rice w/ canned tuna, broccoli & roasted duck
18 Dec 2012
    Breakfast : Brown rice w/ canned tuna, broccoli & fried pork
    Lunch      : Brown rice & Omelette w/ pork