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M1 Particle on a block on a slope

Hey. This question is troubling me 7(iii).
http://www.ocr.org.uk/Images/175268-question-paper-unit-4728-01-mechanics-1.pdf

please could someone explain to me what the first step that i have to do is, i dont see how to find the force that is pulling the block up the slope, is is just the friction between the particle and the block?
thanks in advance
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Notnek
21
Original post by SamuelN98
Hey. This question is troubling me 7(iii).
http://www.ocr.org.uk/Images/175268-question-paper-unit-4728-01-mechanics-1.pdf

please could someone explain to me what the first step that i have to do is, i dont see how to find the force that is pulling the block up the slope, is is just the friction between the particle and the block?
thanks in advance

The question says that B is in equilibrium as P moves on its upper surface.

So only P and Q are moving.
Reply 2
Avatar for SamuelN98
SamuelN98
OP
5
Original post by notnek
The question says that B is in equilibrium as P moves on its upper surface.

So only P and Q are moving.


But wont the friction of particle P effectively act on B?
Reply 3
Avatar for Notnek
Notnek
21
Original post by SamuelN98
But wont the friction of particle P effectively act on B?

Yes but the weight of the particle (component acting down the slope) is keeping the block in equilibrium.

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