Question

the kinetic energy of an object having constant mass is....1)stored energy 2)vector quantity 3)independent of speed V4)proportional to vector V

Answer 1

Kinetic energy of a body with constant mass(m) moving with velocity (V), in any direction, is 1/2×mV². So KE has nothing to do with vector.
This energy is stored in the body and can convert into Potential energy or can be lost due to friction.. So 1st option is correct.