A system consists of two objects that collide in a partially elastic collision. Which two properties of the system are conserved by the collision? mass and kinetic energy momentum and mechanical energy momentum and kinetic energy momentum and mass

Mass, momentum and mechanical energy

Explanation:

There are two types of collision.

1. Elastic collision: in case of elastic collision no energy is loss in form of heat and sound.

The momentum and the kinetic energy is conserved.

2. Inelastic collision: in case of inelastic or partially elastic collision, some of energy is lost in form of heat or sound. Here momentum and mechanical energy is conserved.

Mass of a system is always conserved.