Two blocks A and B of the same mass are joined by a light string and placed on a horizontal surface. An external horizontal force P acts on A. The tension in the string is T. The forces of friction acting on A and B are F1 and F2 respectively. The limiting value of F1 and F2 is F0 . As P is gradually increased,
Answers
Answer:
Case (I) for P<F0 , all the force will be opposed by friction on block A hence no tension in the string.
Case (II) for P<2F0 , forced cancelled by a block friction is F0 and rest of force is opposed by friction of second block. so tension in string is friction on B =P−F0
Case (III) for P>2F0 , T= force for accln. of B + force of friction on B
T=2MP−2F0×M+F0=2P
Answer:
Case (I) for P<F0
, all the force will be opposed by friction on block A hence no tension in the string.
Case (II) for P<2F0
, forced cancelled by a block friction is F
0
and rest of force is opposed by friction of second block. so tension in string is friction on B =P−F0
Case (III) for P>2F0
, T= force for accln. of B + force of friction on B
T=
2MP−2F0 ×M+F 0
= 2P