What are the parts of a pendulum? describe each one

The Pendulum consists of three parts, they are

1. Fixed point

2. String/Wire

3. Bob or Weight

The fixed point is the point where wire hangs and weight attached to the other end point of the wire as shown in the figure.

Depending on the length of string/wire, the pendulum swings at a uniform speed.  

We find Frequency, time period and length of the string by using Pendulum.

hypothesising or postulating

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day