LetzelPretzel Posts: 2, Reputation: 1 New Member #1 Nov 7, 2017, 07:13 PM
Force required to move block when between two surfaces
A 5N block sits on a table with a smaller (1N) block on top, attached to the table with a string that makes an angle of 65 degrees to the table. All coefficients of friction are 0.3. Calculate the force required to pull the block to the right.
 talaniman Posts: 54,327, Reputation: 10855 Expert #2 Nov 7, 2017, 07:36 PM
Which formula(s) are you using?
 LetzelPretzel Posts: 2, Reputation: 1 New Member #3 Nov 7, 2017, 08:01 PM
@talaniman Well, to find Ffr is mu*Fn and then to find the total force, you can say the sum of the forces must equal 0 because of f=ma, and a is zero, so the force would just be the opposing forces. But I don't understand how to incorporate the string and second block's friction...
 talaniman Posts: 54,327, Reputation: 10855 Expert #4 Nov 7, 2017, 10:35 PM
Draw a picture, and calculated the total force of the vector of magnitude.

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