Question

give example of system who's momentum at any instant is zero bit not its kinetic energy​

Answer 1

At any time, since the momenta of the two masses are opposite and equal in magnitude, the total momentum of the 'device' is zero. However, each possesses kinetic energy, so the total kinetic energy of the system is non-zero. Another example would be a box filled with gas (air, for instance).

PLZ MARK ME AS BRAINLIEST!!!!!!!!!!!!