Question

the equation of projectile is?????

Answer 1

there are many

Answer 2

You can read in detatil over here:
http://www.real-world-physics-problems.com/projectile-motion.html

Answer 3

in the horizontal direction the object moves at a constant speed
x = vt
in the vertical direction the object moves with accelerated motion
y = vt + 1/2 at^2

All of the constant acceleration kinematics equations would apply to the vertical direction. Those highlighted above a just often useful not completely exhaustive.

Answer 4

the equation of a parabola...

Answer 5

So there are two types of projectile motion. For horizontal, which is the Uniformly Accelerated Motion, there are three helpful equations you can use. here:

\[dx = Vit - 1/2 at ^{2}\]
~this equation can be helpful if the final velocity isn't given.

\[2adx = Vf ^{2} - Vi ^{2}\] or \[dx = (Vf ^{2} - Vi ^{2}) \div 2a\]
That can be used when looking for the distance with both velocities and acceleration. Note that the acceleration for these equations should be constant, otherwise it wouldn't be applicable.

For the vertical projectile kind of motion, it is called Free Fall.
In this kind of motion, the air resistance is neglected.

Basically, the two only use the same kinds of equations but for Free Fall, one should use gravitational acceleration (-9.8 m/\[s ^{2}\]). It is negative because of the direction which is south.

A tip: the results of the Final velocity is always negative or zero. while the Initial velocity is always positive or zero. In this motion as well, the time is for the time that the object stays suspended in the air before falling back to the ground.

hope this helps. :)