Hi, This is silver doing 12th year, I have clearly anyidea regarding inextensible string, could you please explain and help me in this problem. Thank you well in Advance.
A mass of 2kg lies on a rough plane whichis inclined at 30 degree to the horizontal. One end of a light inextensible string is attached to this mass and the string passes up the line of greatest slope and over a smooth pulley fixed at the top of the slope; a freely suspended mass of 5 kg is attached to its other end. The system is released from rest; as the 2kg mass accelerates up the slope, it experiences a constant resistance of motion of 14 Ndown the slope due to the rough nature of the surface. Find the tension in the string?
MY solution: force = mg= 2x9.8= 19.6N at 30 degree
Force parallel to the plane= 196x sin 30 = 98N
A system of mass 7kg is acclerated. Force applied is 14N down
Object B weigh 9.8x5= 49N
Net force = 98N-49N-14N
= 35 N
I have no idea. I would appreciate if you take time to explain this.