Phys 103 - BlackBoard Notes: Radial Force

Radial Force
BlackBoard Notes

======================= Photo - Click for a Larger Version =============================

======================= First Board Section =============================

Measure the force exerted on Bob by a spring:

when Bob is rotating
when Bob is at rest

Check the notation used for the class: Are they FBDs (Free Body Diagrams) or Force Diagrams?
- What are the FBDs in each case?
  - or
- What do the force diagrams look like in each case?

======================= Second Board Section =============================

Rotating Bob:

Measure d with ½-m stick & calipers (record both caliper positions)
Measure D_shaft & D_pointer with vernier calipers
What is the force diagram for Bob while rotating?

======================= Third Board Section =============================

Assume a circular orbit:

Bob's orbit

.

(where ω ≡ "omega")
Velocity Acceleration

So: F_{Spring (Rotate)} = ma_radial

{(Point to each parameter) where <T> is average period and m is Bob's mass}

======================= Fourth Board Section =============================

Bob at rest:

What is the force diagram for Bob when at rest?
What is the force diagram for m₂ when at rest?
- How will this allow you to calculate F_{Spring (Rest)}?

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