I believe it means that the flywheel smoothing is not perfect, it does not iron the speed out to be a perfectly constant 430 RPM. Rather, it smooths it out so that as the flywheel rotates, its instantaneous angular velocity during every revolution varies from a few % less than [what equates to] 430 RPM to the same few % faster than [what would equate to] 430 RPM.manal950 said:and I don't understand what mean by Speeeeed varies from above and below ?
0.02 is 2% and I think I explained the rest in post #2manal950 said:see the teacher said
N1 = 430 + ( 0.02 X 430 ) = 438.6 rpm
N2 = 430 - (0.02 X 430 ) = 421.4 rpm
How is that please tell me
manal950 said:I know this 430 + ( 0.02)
but why then multiply in 430 ??
Momentum of inertia, also known as rotational inertia, is a measurement of an object's resistance to changes in its rotational motion. It is dependent on the mass and distribution of the object's mass around its axis of rotation.
Linear momentum is a measurement of an object's motion in a straight line, while momentum of inertia is a measurement of an object's rotational motion. They are related by the equation L = Iω, where L is linear momentum, I is momentum of inertia, and ω is angular velocity.
The formula for calculating momentum of inertia depends on the shape of the object. For a point mass, I = mr^2, where m is the mass and r is the distance from the axis of rotation. For a rigid body, the formula is more complex and involves integrals and the object's density distribution.
Momentum of inertia is an important concept in understanding rotational motion and is used in many practical applications, such as designing machines and predicting the behavior of rotating objects. It also helps us understand the conservation of angular momentum, which states that the total angular momentum of a system remains constant in the absence of external torques.
No, momentum of inertia cannot be negative. It is a physical property of an object and must have a positive value. It can, however, be zero for objects with all of their mass concentrated at the axis of rotation.