Two people are initially standing still on frictionless ice

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

16. Two people are initially standing still on frictionless ice. They push on each other so that one person, of mass 120 kg , moves to the left at

2 \mathrm{~m} / \mathrm{s}

, while the other person, of mass 80 kg , moves to the right at

3 \mathrm{~m} / \mathrm{s}

. What is the velocity of their center of mass? (A) Zero (B)

0.5 \mathrm{~m} / \mathrm{s}

to the left (C)

1 \mathrm{~m} / \mathrm{s}

to the right (D)

2.4 \mathrm{~m} / \mathrm{s}

to the left (E)

2.5 \mathrm{~m} / \mathrm{s}

to the right