A block rests on a rough horizontal table ( )

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

4\,\text{kg}

block rests on a rough horizontal table (

\mu_s = 0.30

). It is attached by a light string over a smooth pulley to a hanging mass

m_2

. The minimum value of

m_2

that will just set the system in motion is (a)

1.7\,\text{kg}

(b)

1.2\,\text{kg}

(c)

0.8\,\text{kg}

(d)

2.0\,\text{kg}