In: Physics
How to slove: Simple Harmonic Motion
| Amplitude = 10ᵒ | m = 100.0 g | |||||||||||||
| Length = | 1.000 m | 0.850 m | 0.700 m | 0.550 m | 0.400 m | 0.250 m | 0.100 m | |||||||
| Trial | t10 (s) | T (s) | t10 (s) | T (s) | t10 (s) | T (s) | t10 (s) | T (s) | t10 (s) | T (s) | t10 (s) | T (s) | t10 (s) | T (s) | 
| 1 | ||||||||||||||
| 2 | ||||||||||||||
| 3 | ||||||||||||||
| 4 | ||||||||||||||
| 5 | ||||||||||||||
| Average: | ||||||||||||||


We have plotted scatter graph of Period square 
 vs. Length of string 
 and its linear best-fit line. The Y-values represent the period
square 
 and X-values represent the length of string 
.
The linear best-fit line equation is:


The slope 
 of the best-fit line equation is:

The Y-intercept 
 of the best-fit line equation is:

Therefore, the best-fit line equation is:

We know that the period of the pendulum is expressed as:

Equating equation (1) and (2) gives the slope of the linear
best-fit line is equal to term 
.




Therefore, the experimental value of the gravitational
acceleration is 
.
The percentage difference between experimental value of the
gravitational acceleration 
 and theoretical value of the gravitational acceleration 
  is calculated as:


