Question

Two blocks A & B of masses mA & mB respectively are connected with a string passing over a frictionless pulley fixed at the corner of a table with co-efficient of friction between A & the table is 0.2. (i) The acceleration, tension in the string is: (ii) The minimum mass mC of the third block that is placed on A to prevent A from moving.
Please answer , would be really helpful

Answer 1

Answer:

To just begin to slide up the friction will be kinetic friction

Applying free body diagram on blocks

m

1

gsin30

o

+μm

1

gcos30

o

=m

2

g

m

1

=m

2

=m

⇒

2

mg

+μmg

2

3

=mg

⇒μ=

3

1

Explanation:

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