Four point masses lie along a line: at

PHYSICS · Subjective · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

Four point masses lie along a line:

1.0\,\text{kg}

x=-0.30\,\text{m}

2.0\,\text{kg}

x=0.20\,\text{m}

3.0\,\text{kg}

x=0.60\,\text{m}

, and an unknown mass

m

x=1.20\,\text{m}

. The center of mass of all four masses is measured to be at

x=0.45\,\text{m}

. The mass at

x=1.20\,\text{m}

is then removed. Determine the value of

m