TBR physics1

[gonnamakeit13]

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Hi guys,

I have a quick question from TBRPhysics Book1 Waves and Periodic Motion page-257 #32

My answer D based on the formula T=2Pi(m/k)^1/2
Correct answer is B because the passage provided with the formula T=1/2pi (g/L)^1/2 only so period is not dependent on mass.

My question is do we only use the formulas provided by the passage only or this is a special case?

 

[brood910]

You are talking about two equations for two different systems.
The one you already know is for springs, while the one from the passage is for pendulum.
Also, it's T = 2pi(l/g)^1/2. The one you provided is for frequency.

Once again, as I always say to ppl who are weak in physics, DO NOT JUST MEMORIZE EQUATIONS.

 

[gonnamakeit13]

Thanks for the feedback,and you're right regurgitation for physics is not a good idea!