1. Spring and Pendulum Goal:
Examine simple harmonic motion in an oscillating spring and a simple pendulum

2. Software From Desktop: Click Spring – Mass Oscillator
Observe: Position, velocity and acceleration vs time

3. Period of Oscillation Spring – Mass (SHM) Frequency: f = 1/2π (√k/m)
K – spring constant
m – hanging mass
Period:
Tcal = 1/f = 2π (√m/k)
(calculated value of period)

4. Period for a Pendulum Calculated value: Tcal = 2π (√L/g)
L is the length of the pendulum

5. How to get k of the spring
Measure Lo ( length of upstretched spring)
L holder (length of spring with holder (m1))
L holder + 25g m2
L holder + 50 g m3
F = mg = - kX
k1 = m1 g / (L holder - Lo)
k2 = m2 g / (L holder+25g - Lo)
k3 = m3 g / (L holder +50g- Lo)

6. Get Average of k
K = (k1 + k2 + k3) / 3

7. Experimental value of period T (spring – mass)
Observe:
ti: time initial
tf: time final
n: number of oscillation ( peak to peak)
Texp = (tf – ti)/n
Calculate the error%

8. Experimental value of period T (Pendulum)
Let the pendulum oscillate 20 times, record the time t:
Period:
Texp = t / 20
Error%