A Rocket Explodes into Three Pieces of Equal Mass

question 7

Multiple Choice

A rocket explodes into three pieces of equal mass.Immediately after the explosion their velocities are (120 m/s,south) ,(240 m/s,north) and (120 m/s east) .What was the velocity of the rocket's center of mass before the explosion?

• A)40 m/s,northeast
• B)57 m/s,northeast
• C)120 m/s,northeast
• D)170 m/s,northeast