In the concept of projectiles, will the horizontal velocity change from its initial velocity?

Does the -9.8 m per second squared makes all the difference?

Question

In the concept of projectiles, will the horizontal velocity change from its initial velocity?

Does the -9.8 m per second squared makes all the difference?

anonymous · Answer

Horizontal velocity remains constant

anonymous · Answer

-9.8 m/s^2 if we take upward motion are -ve

anonymous · Answer

No it'll not as there are no horizontal forces acting upon projectiles. Horizontal Velocity also does not depend on Gravity or Vertical Velocity.

anonymous · Answer

@LemuelPogi  Did u understand!

anonymous · Answer

since gravity acts only along the vertical direction

anonymous · Answer

So horizontal velocity does not change and vertical velocity decreases by -9.8m/s^2?

anonymous · Answer

Yes, absolutely true.

ujjwal · Answer

It would be appropriate to say: 
The vertical velocity decreases 'at the rate of' 9.8 m/s^2.

shane_b · Answer

I'd just like to point out that all of the answers above assume there is no drag/wind forces affecting the horizontal velocity.