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Describing Rotational Motion (8.1), OR, OR, OR, Reema Alahmari 10/c -…
Describing Rotational Motion (8.1)
Displacement
Linear (X)
Its the product of the radius and angular displacement.
X = r x Θ
Angular (Θ)
It represents the change in the angle of revolution.
Θ = x / r
OR
Θ = ω · t
Acceleration
Linear (a)
The product of radius and angular acceleration.
a = r · α
Angular (α)
The change in angular velocity over time.
Measured in rad/s²
α = ω / t
α = a / r
Instantaneous
It is the slope of the graph
Velocity
Linear (v)
The product of radius and angular velocity.
V = r · ω
Angular (ω)
The change in the angular displacement overtime.
Measured in rad/s
ω = Θ / t
ω = v / r
Instantaneous
It is the slope of the graph.
Frequency
Angular frequency is the number of complete oscillations in one second
f = 1 / T
f = ω / 2𝝅
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Reema Alahmari 10/c