A ball of m and speed v collide head on with a ball of mass 2m and speed v/2, if the two balls stick together their speed after the collision is

Asap time is ! best answer gets compose at least one well-developed paragraph on the following: define the term concurrent powers, and give an example of a concurrent power of government.

Figure 9 on page 362 shows various motions of balls. the curved path followed by the yellow ball in b in picture b is result of a) inertia b) centripetal motion c) gravity and horizontal velocity d) linear motion

Can anybody me with this? ? (picture included.)