A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand-starting a lawnmower. If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, ω in rev/s? The moment of inertia of a disc is 1/2MR2. There's no sliding. Strap's final speed = v = 0.99 m/s. The disc's radius is R = 0.3 m The disc's mass is M = 0.8 kg
Angular speed, acceleration and displacement
Angular acceleration is defined as the rate of change in angular velocity with respect to time. It has both magnitude and direction. So, it is a vector quantity.
Angular Position
Before diving into angular position, one should understand the basics of position and its importance along with usage in day-to-day life. When one talks of position, it’s always relative with respect to some other object. For example, position of earth with respect to sun, position of school with respect to house, etc. Angular position is the rotational analogue of linear position.
A strap, rod, or something comparable is used to spin up the disc. I imagine someone hand-starting a lawnmower.
If he pulls the strap with a final speed before pulling the strap away, what is the rotation rate of the disk, ω in rev/s? The moment of inertia of a disc is 1/2MR2. There's no sliding.
- Strap's final speed = v = 0.99 m/s.
- The disc's radius is R = 0.3 m
- The disc's mass is M = 0.8 kg
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