This preview shows pages 1–3. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: attachment to each mass this the tension would manifest itself as a vector force which is directed vertically upward. Where the string makes contact with the wheel the scalar tension manifests itself as a downward force (as though the string were attached to the wheel at this point). At each mass we would write y ma mg T a m F = = r r T is in positive y direction because the tension produces an upward force. Since the pulley does not move the sum of forces on the pulley would be written as = = T T F a m F r r where T is in the negative y direction because the force due to tension acts downward. 1 This is true in the limit of a light string. If the string has substantial mass a net force would be required to accelerate the string and assumption that the net force is zero would fail....
View
Full
Document
 Fall '11
 LA PORTA
 mechanics

Click to edit the document details