In an Elastic Collision Between Two Bodies of Equal Mass

Multiple Choice

In an elastic collision between two bodies of equal mass, with body 2 initially at rest, body 1 moves off at angle θ relative to the direction of its initial velocity and body 2 at angle φ. The sine of the sum of θ and φ, sin(θ + φ) , is equal to

A) 0.
B) 0.500.
C) 0.707.
D) 0.866.
E) 1.00.