Rotational Equilibrium and Newton's First Law in Rotational Form

AP Physics 1· difficulty 2/5

40~\text{kg}

A
$30~\text{kg}$
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B
$53~\text{kg}$
C
$40~\text{kg}$
D
$20~\text{kg}$

Explanation

m_1 g d_1 = m_2 g d_2 \Rightarrow m_2 = (40)(1.5)/2.0 = 30~\text{kg}

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