Block of mass rests on a horizontal table and is connected by a light string over a…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

Block

A

of mass

4\,\text{kg}

rests on a horizontal table and is connected by a light string over a frictionless pulley to a hanging block

B

(mass

m_B

). The coefficient of static friction between block

A

and the table is

\mu_s=0.50

. What is the minimum mass

m_B

that will cause block

A

to start moving? (Take

g=9.8\,\text{m/s}^2

.) (a)

8.0\,\text{kg}

(b)

1.0\,\text{kg}

(c)

2.0\,\text{kg}

(d)

4.0\,\text{kg}