Question

Acceleration of block A varies with time as shown in figure the value of coefficient of kinetic friction between the block A and B is

• A. 0.5
• B. 0.6
• C. 0.4
• D. None of these

Answer 1

The correct option is A 0.5

Given: acceleration of block A varies with time as shown in figure

To find the value of coefficient of kinetic friction between the block A and B

Solution:

Force is applied on block B. The moment when the block A starts sliding is the moment when the applied force F is greater than the frictional force between the two blocks.

Apply Newton's Second law of motion we get

$m{a}_A=\mu gm⟹a_A=\mu g⟹4.9=\mu \left(9.8\right)⟹\mu =0.5$

is the value of coefficient of kinetic friction between the block A and B