Getting the angular velocity using the angular acceleration graph

In summary, to calculate angular velocity using an angular acceleration graph, you simply need to find the slope of the graph at a specific point. The difference between angular velocity and angular acceleration is that angular velocity measures how fast an object is rotating while angular acceleration measures how quickly the object's angular velocity is changing. Angular acceleration and linear acceleration are related through the radius of rotation, with angular acceleration measuring how quickly the object's angular velocity is changing and linear acceleration measuring how quickly the object's tangential velocity is changing. Angular velocity is measured in radians per second (rad/s) and angular acceleration is measured in radians per second squared (rad/s²) because these units are based on the standard unit of angle, the radian, making calculations more accurate
  • #1
dahoom102
12
2
Homework Statement
The graph below shows a plot of angular acceleration in rad/s2 from t=0 to t = 8s, the angular velocity at t=0 is 5rad/s ccw. the angular velocity at t=8 is
Relevant Equations
α=dω/dθ
1612806379741.png

1612806406863.png

The answer here is A
What i did is getting the area as follows,
2×4×1/2 +3×-6×1/2 +4×-6 = -29
and then use this
Δω=ωf-ωi
-29=ωf-5
ωf=24
but there is no such choice.
 
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  • #2
Why 4x-6 (in your language) ?
 
  • #3
BvU said:
Why 4x-6 (in your language) ?
oh my mistake I didn't notice thanks a lot!
 
  • #4
dahoom102 said:
Relevant Equations:: α=dω/dθ
##\alpha = \dfrac{d\omega}{dt}=\omega \dfrac{d\omega}{d \theta} .~~## :oldsmile:
 
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What is angular velocity?

Angular velocity is a measure of how fast an object is rotating or moving in a circular motion. It is typically measured in radians per second.

How is angular velocity related to angular acceleration?

Angular velocity and angular acceleration are related through the equation ω = αt, where ω is angular velocity, α is angular acceleration, and t is time. This means that angular velocity is directly proportional to angular acceleration and time.

How do you calculate angular velocity from an angular acceleration graph?

To calculate angular velocity from an angular acceleration graph, you can use the slope of the graph at a specific point. The slope represents the rate of change of angular velocity at that point, and you can use the equation ω = αt to find the angular velocity at that point.

What is the difference between positive and negative angular velocity?

Positive angular velocity indicates that an object is rotating in a counterclockwise direction, while negative angular velocity indicates that an object is rotating in a clockwise direction. This is based on the convention that counterclockwise rotations are considered positive and clockwise rotations are considered negative.

Can angular velocity be constant while angular acceleration is changing?

Yes, it is possible for angular velocity to be constant while angular acceleration is changing. This can occur when the angular acceleration is changing at a rate that keeps the angular velocity constant. This is known as uniform circular motion.

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