Magnitude of Frictional Force in Simple Harmonic Motion

  • #1
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Homework Statement


upload_2017-6-11_1-11-47.png


I do not fully grasp the concept behind all of these sub questions (i)-(iv).

Homework Equations


v=wAcos(wt) (SMH)?
Friction Force = Coefficient of Friction * Normal Force

The Attempt at a Solution



(i) Varying as simple harmonic motion sees varying acceleration as it oscillates forwards, until a stationary point and then backwards.

(ii) Same (not varying) as block A moves with block B, in identical harmonic motion?

(iii) I think this has to do with the result of (ii), which would indicate (ii)'s correct answer is 'varying' but I am not sure why (conceptually).

(iv) as (iii)
 

Answers and Replies

  • #2
jbriggs444
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F=ma. If a is varying, what can be said about F?
 
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F=ma. If a is varying, what can be said about F?
I see, very simple. Thank you!

So for (iii), block A would be more likely to slip when block B is at x=d because at x=d block B would have greater acceleration (would it?)
 
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  • #4
jbriggs444
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I see, very simple. Thank you!

So for (iii), block A would be more likely to slip when block B is at x=d because at x=d block B would have greater acceleration (would it?)
Yes!
 

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