A billiard ball of mass m hits another one of the same mass. The first ball moves off at 30 degrees. For an elastic collision what are the velocities of both balls after the collision. In the lab frame where the second ball starts at rest, what angle compared to the direction of initial velocity of the first ball does the 2nd ball move?

Answer the above statement is ( false );

Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.

I'm having some difficulty seeing the diagram clearly.but the question says there's a net inward force on the object.so we know right away,  from newton's 2nd law of motion, thatthat baby is accelerating.  it doesn't even matter which way thenet force is pointing.  if there's any net force, then either theobject's speed or else its direction must be changing.