TBR Circular Motion Question

[salsasunrise123]

Hi, I am confused with example 2.7a and 2.7b. How do you know that they are giving you angular velocity in A but frequency in B. Both are in same units and I don't know how to distinguish. Thanks! Also, BR gives a lot of equations for circular motion but MCAT only tests centripetal force and acceleration (2 equations). Do you recommend memorizing all the equations BR provides in this section? Thx

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[brood910]

Nah. It is highly unlikely that you will have to know the equations for rotational motion. But they are pretty much the same as the ones for kinematics..

 

[salsasunrise123]

Thx, but can someone clarify the 2 TBR problems I listed???

 

[Cmdr_Shepard]

The difference between those is similar to the difference between speed and velocity. One is a scalar (Ang. Frequency) and one is a vector (Ang velocity).

I haven't seen the question, but are they giving you a direction in one but not the other?