Question

5
83. A force F = t is applied to block A as shown in
figure. The force is applied at t = 0 seconds when the
system was at rest and string is just straight without
tension. Which of the following graphs gives the friction
force between B and horizontal surface as a function
a time 't'.
B
A
m
3
F
μς > μK
Is =Mk​

Answer 1

Answer:

b is the answer as i know