A ball of mass 2.0 kg is travelling at a speed of 12 m/s. It moves towards an object of mass 3.0 kg which is at rest. The ball hits the object and sticks to it.

Which row gives the total momentum, and the speed of both objects immediately after the collision?

total momentum (kg m/s)
A- 0
B- 0
С- 24
D- 24

AND..

speed (m/s)
A- 4.8
B- 8.0
C- 4.8
D- 8.0

It should be d if not then c

Answertraveling around a circular trackexplanation"traveling around a circular track" is the best answer as you could be traveling around a circular track at a constant speed. your velocity would therefore have the same magnitude but will always be constantly direction. since acceleration is the rate of change of velocity, the rate of change will only involve the direction of velocity and not the magnitude.wrong choices: "an object at rest" does not accelerate at all"increasing speed while traveling around a curve" means that the acceleration will not be constant due to only change in direction; it will be constant due to both magnitude and direction"an object in free fall" does not necessarily change direction 

Ai think hope that