# Empower Your Understanding: Physics of Collisions

## How can physics concepts be applied to determine the motion after a collision?

When two objects with different masses collide, what factors affect their subsequent movement?

What role does friction play in the motion of objects after a collision?

## Understanding the Science Behind Collisions

When Fred (mass 60 kg) and Brutus (mass 120 kg) collide, they will slide in the direction of the net external force acting on them. To determine the direction of the net external force, we need to consider the forces acting on Fred and Brutus before and after the collision.

The force of kinetic friction between their football uniforms and the astroturf plays a crucial role in determining the direction and distance of their sliding motion after the collision.

## Exploring the Dynamics of Collisions

When objects collide, the principles of physics come into play to analyze the resulting motion. In the scenario of Fred and Brutus colliding, their masses, initial velocities, and the coefficient of kinetic friction determine how they will move after the collision.

Upon collision, Fred and Brutus experience a net external force due to the force of kinetic friction acting in the opposite direction of their initial motion. This force causes them to slide in the direction opposite to their initial velocities.

The coefficient of kinetic friction, representing the interaction between their football uniforms and the astroturf, influences the magnitude of the force that opposes their motion. This force ultimately leads to the deceleration and sliding of Fred and Brutus on the surface.

By applying Newton's laws of motion and equations of motion, we can calculate the distance they will slide following the collision. Understanding these fundamental physics concepts enhances our ability to analyze and predict the outcomes of collisions, providing valuable insights into the dynamics of interacting objects.