Define the terms pelo and principle axist and focus or principal focus of a spherical mirror

Pole - The central point of the reflecting spherical surface is called pole (P). It lies on the surface of the mirror. ... (d) Principal focus - Incident rays parallel to the principal axis, after reflection either converge to or appear to diverge from a fixed point on the principal focus of the spherical mirror.

Explanation:

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.