Question

explain about projectile motion and give examples of projectiles

Answer 1

Projectile motion is a form of motion experienced by an object or particle (a projectile) that is thrown near the Earth's surface and moves along a curved path under the action of gravity only (in particular, the effects of air resistance are assumed to be negligible).
 For example, you throw the ball straight upward, or you kick a ball and give it a speed at an angle to the horizontal or you just drop things and make them free fall; all these are examples of projectile motion. 
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Answer 2

When any object is thrown from horizontal at an angle 0° except 90° then the path followed by it is called Trajectory, the object is called projectile Nd it's motion motion is called projectile motion...

Example - A baseball that has been pitched, batted or thrown...