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IN A PROJECTILE MOTION WE TAKE MOTION IN A HORIZONTAL DIRECTION AS g=0 while in vertical motion as g=-9.8 meter / second square why?
Asks Atanu PAUL
Projectile Motion is an example for motion in two dimension. It can be studied easily by resolving into two components – The vertical motion is affected by gravity and the horizontal motion is not affected by gravity.
Therefore we take g=0 when we consider the horizontal component of motion as the projectile is not accelerated in the horizontal direction. The horizontal component of velocity remains constant through out its motion.
The following presentation will help you understand the concept better.
A PowerPoint Presentation on projectile_motion
- A Few problems from Projectile Motion (askphysics.com)
- Uniform Circular Motion in Horizontal Plane (askphysics.com)
- Gravity, Balance and some doubts (askphysics.com)