Why only to normal velocity?PeroK said:
Because the energy lost is in the compression and subsequent expansion of the object, and the extent of the compression depends on the velocity component normal to the contact surface.Vladimir_Kitanov said:
Resolve the initial velocity into components.Vladimir_Kitanov said:
Yes, and that.malawi_glenn said:
Oblique bouncing with friction is quite complicated. Assuming no slipping, as the ball compresses, the frictional component of the reaction force exerts a torque about the ball's centre, causing it to start rotating. So now we have rolling resistance as a new part of the ball starts to compress and a corresponding part starts to decompress.malawi_glenn said:
The coefficient of restitution is a measure of the elasticity of a collision between two objects. It is defined as the ratio of the relative velocity of separation after the collision to the relative velocity of approach before the collision.
The coefficient of restitution is calculated by dividing the relative velocity of separation by the relative velocity of approach. This can be determined by measuring the velocities of the objects before and after the collision.
The coefficient of restitution is directly related to the impact force. A higher coefficient of restitution means a more elastic collision, resulting in a lower impact force. A lower coefficient of restitution means a more inelastic collision, resulting in a higher impact force.
The coefficient of restitution plays a major role in determining the rebound height of a ball. A higher coefficient of restitution means the ball will rebound to a greater height, while a lower coefficient of restitution means the ball will rebound to a lower height.
The coefficient of restitution can be affected by factors such as the materials and surface properties of the objects involved in the collision, the angle and speed of impact, and external forces such as air resistance or friction. Temperature and humidity can also have an impact on the coefficient of restitution.