Question

the maximum value of F such that both blocks move together is
a) umg
b) u(m1+m2)g
c) u(m1/m2)(m1+m2)g
d) u(m2/m1)(m1+m2)g​

Answer 1

Answer:

Let both blocks move together with acceleration a.

making FBD of m-2 block for vertical balance

M=M

2

g

⇒fr=μM

2

g

⇒a=

M

2

fr

=μg ........(1)

making FBD of second block

F−fr=M

1

a

F−μm

2

g=M

1

(μg)

⇒F=μ[M

1

+M

2

]g.

Explanation:

HOPE THIS WILL HELP YOU

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Answer 2

Answer:

b) u(m1+m2)g

(b t dubs, are you from FIITJEE or Allen?, just curious)