24-09-10 - o The m a g nitud e of th e force is called th e...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Friday, September-24-10 - Newton’s law (II) - Chapter 5, problems 20,25,27,57,69 - Free body diagrams o Shows the forces acting upon a body o Pick one object, what ever the forces are exerting themselves on o Draw all external forces which act directly on the object Gravity, contact, electromagnetic o Indicated the direction of the acceleration of the object but remember mA is not a force – but mg is applicable - Example: free-body diagram o A block is pulled up a frictionless ramp Title, to indicate the chosen object Contact forces, to replace the rope and the ramp Gravity doesn’t require contact A may be indicated for reference, but is not a force Figure 1.1 - Ropes a n d pulleys o A rope att ach ed to so m ething exerts a force p arallel to th e rope
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: o The m a g nitud e of th e force is called th e tension of th e rope o Tension is uniform in a rope of n e gligible m a ss o The tension is not cha ng ed if th e rope p a ss es over a nd ide al pulley(frictionless a n m a s sless) o Tensions h a s units of force( n ewtons ) Figure 1.2 o Example about the amount of forces in the diagrams There 4 forces o Quiz 1 The forces acting on the student and the bucket are Gravity Tension of the rope of the rope on the bucket Tension of the rope that the student pulls on Tension is the same at the both tends of the rope if the rope is ideal and the pulley is ideal...
View Full Document

Page1 / 2

24-09-10 - o The m a g nitud e of th e force is called th e...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online