Challenging the robotic arm

A robotic arm be at(The flying ping pong ball challenge). Arm should be choose A ball from two ball with different mass .

First ball mass = $\text{}12 gr$

Second ball mass = $\text{}14 gr$

Then which ball should be choosen by arm that win the challenge?

Assumptions:

• Robotic arm has a advance program about Gravity.

• The electric source of arm is $\infty$ .

• Gravity acceleration = $\frac{9.8m}{sec}$ .

• (The flying ping pong ball challenge) is a prevalence to gravity game.