A puck slides due east across frictionless ice at and strikes an identical puck that…

PHYSICS · Single correct · CBSE · Physics · Work, Energy and Power · Work, Energy and Power

Problem

0.20\,\text{kg}

puck slides due east across frictionless ice at

4.0\,\text{m/s}

and strikes an identical puck that is initially at rest. The collision is elastic. After the collision, the first puck travels at

2.0\,\text{m/s}

at an angle of

60^{\circ}

north of east. What is the speed of the second puck immediately after the collision? (a)

3.0\,\text{m/s}

(b)

4.0\,\text{m/s}

(c)

3.5\,\text{m/s}

(d)

2.5\,\text{m/s}