A Level Mechanics: Post your Doubts here

[Tabi Sheikh]

Thankyou people

ur welcme

 

[raihan1904]

so i guess this is of no use to me as i dont think anyone in this thread takes M2???!!!

 

[Tabi Sheikh]

so i guess this is of no use to me as i dont think anyone in this thread takes M2???!!!

well i am

 

[Asad rehman]

 

[Asad rehman]

this is from 9709-s 03-qp 4 solve it completely

 

[kitkat <3 :P]

View attachment 42144

well it says in the direction of PQ so add up the vertical components i.e. 10*cos30 +10*cos30- 6*sin(60)
perpndicular to PQ means horizontal component i.e. 6*sin60 cuz both 10*cos 30 cancel each other
for resultant use the formula under root x square + y square

 

[MafaldaC]

4

Particles A and B, ofmasses 0.2 kg and 0.3 kg respectively, are connected by a light inextensible string.

The string passes over a smooth pulley at the edge of a rough horizontal table. Particle A hangs freely

and particle B is in contact with the table (see diagram).

(i) The system is in limiting equilibrium with the string taut and A about to move downwards. Find

the coefficient of friction between B and the table. [4]

A force now acts on particle B. This force has a vertical component of 1.8N upwards and a horizontal

component of X N directed away from the pulley.

(ii) The system
is now in limiting equilibrium with the string taut and A about to move upwards.

Find X.

Please can someone explain me part ii and what difference does it make if a is going up or down?? HELPPPP PLS

 

[shiny_tanu✨✨]

heyy guys , wud be really grateful if someone could post the link of the mech book by bostock chandler .. thnkss

 

[Ziki629]