A Particle of Mass 2m Is Moving to the Right

Multiple Choice

A particle of mass 2m is moving to the right in projectile motion. At the top of its trajectory, an explosion breaks the particle into two equal parts. After the explosion, one part falls straight down with no horizontal motion. What is the direction of the velocity of the other part in the instant after the explosion?

A) up and to the left
B) stops moving
C) up and to the right
D) straight up
E) down and to the right