The discussion revolves around the calculation of angular acceleration (α) given an angular velocity (ω) of 5 rad/s, mass (M) of 4 kg, radius (R) of 2 m, and a time period (T) of 3 seconds for one revolution. Participants explore the relationship between angular velocity and angular acceleration, as well as the conditions under which these quantities can be calculated.
Participants generally agree that the angular acceleration is zero if the angular velocity is constant. However, there is disagreement regarding the sufficiency of the provided data and whether the focus should be on angular or centripetal acceleration.
The discussion highlights potential limitations in the problem statement, including missing assumptions about the motion and the relationship between angular velocity and time period.
How the angular velocity is changing.sherazi21st said:I've only this data, what is missing?
Angular acceleration is related to tangential acceleration, not centripetal acceleration. But all you gave us is an angular velocity.sherazi21st said:I had also the same point but I got this data only. I thought there may be any method to convert this by either convert this ang. vel. to tang. vel. by rw and then it might be converted into angular acc. by using definition of centripetal acc. or something else if I'm not wrong.
Doc Al said:How the angular velocity is changing.
Are you sure you want angular acceleration, not centripetal acceleration?
Doc Al said:Angular acceleration is related to tangential acceleration, not centripetal acceleration. But all you gave us is an angular velocity.
You need to describe what you are being asked to find in more detail. What did you measure? What physics topic are you studying now?
Sure. You can also use this equivalent expression and save yourself the conversion: ac = ω2rsherazi21st said:Can you tell me how will we calculate Centripetal acceleration? Just by converting w into v and then putting v in v^2/r. Am I correct?
Is it moving with constant speed, or does it start from rest (for instance)?sherazi21st said:I am given only radius of the horizontal circle in which a mass m is moving and completes one revolution in t seconds.
Doc Al said:Is it moving with constant speed, or does it start from rest (for instance)?
In that case, the angular acceleration is zero, as pointed out by russ_watters earlier.sherazi21st said:constant w
sherazi21st said:hi,
I've calculated
ω=5 rad/s
How can I calculate angular acceleration (α)
I've Mass, M=4Kg
Radius, R = 2m
and time taken by each single revolution, T=3sec.