Asoldier throws a grenade horizontally from the top of a cliff. which of the following curves best describes the path taken by the grenade?
question 5 options:
circle
ellipse
hyperbola
parabola

Parabola is the curve that best describes the motion of the grenade.

Parabola

Explanation:

Here the grenade is thrown at a particular angle from a height.  A parabolic path is the feature of an object projected to a height near the earth’s surface. The object thrown is called projectile.

The only influencing force on the projectile is gravitational force which makes acceleration due to gravity, the only acceleration of the projectile.  

So where  is the acceleration along the x axis

This implies the constancy of velocity component along x axis.

none, its a machine