air resistance is neglected...
the horizontal velocity component of an arrow fired from a bow _______ with distance travelled

a. decreases linearely frm zero
b. stays constant at a non-zero value

the answer is B bt I want the reason please

Neglecting air resistance, there is no force that acts on the arrow in the horiziontal direction. From F=ma, if F = 0 in the horizontal direction then there is no acceleration (or deceleration) of the arrow in the horizontal direction. Hence it moves at constant velocity in the horizontal direction.