Mechanics/Dynamics, rorational acceleration

In summary, mechanics is the study of motion and forces on objects, while dynamics focuses on the causes of motion. Rotational acceleration is the rate of change of an object's rotational velocity over time and is calculated using α = Δω/Δt. It is affected by factors such as mass, shape, and applied torque. Rotational acceleration and linear acceleration are related through the moment of inertia.
  • #1
craigman
8
0

Homework Statement


http://img136.imageshack.us/img136/7465/problemchapter5150152gh1.jpg
http://img515.imageshack.us/img515/5239/knownxd2.jpg

Homework Equations


aA=aB+aA/B
aA=aAN+aAT
aN=[tex]\omega[/tex] 2r
aT=[tex]\alpha[/tex] r


The Attempt at a Solution


http://img61.imageshack.us/img61/1521/attemptfj0.jpg

Graphical Solution:
http://img249.imageshack.us/img249/8320/graphicalsolutionaf3.jpg
 
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  • #2
More Calcs
http://img204.imageshack.us/img204/8186/calcsud2.jpg
 
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  • #3
I can't get the correct answer i just don't know why
 
  • #4
does anyone know this stuff?
 

FAQ: Mechanics/Dynamics, rorational acceleration

1. What is the difference between mechanics and dynamics?

Mechanics is the branch of physics that deals with the study of motion and forces on objects, while dynamics is a subfield of mechanics that specifically focuses on the causes of motion and the factors that affect it.

2. What is rotational acceleration?

Rotational acceleration is the rate of change of an object's rotational velocity over time. It is a measure of how quickly an object is spinning or rotating.

3. How is rotational acceleration calculated?

Rotational acceleration is calculated using the formula α = Δω/Δt, where α is the rotational acceleration, Δω is the change in angular velocity, and Δt is the change in time.

4. What factors affect rotational acceleration?

Rotational acceleration is affected by several factors, including the object's mass, shape, and distribution of mass, as well as the magnitude and direction of the applied torque.

5. How is rotational acceleration related to linear acceleration?

Rotational acceleration and linear acceleration are related through the moment of inertia, which is a measure of an object's resistance to changes in rotational motion. The moment of inertia is directly proportional to rotational acceleration and inversely proportional to linear acceleration.

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