Can the speeds of bodies in contact be predicted using physics principles?

[darkelf]

Hi,

Maybe this is more a mechanical question, but here goes.

In a ring on block wear test, if both bodies are in motion, the speed of the ring (RPM) and the speed of the block in motion would both be differ on contact from what the were originally were.

Is there a way of calculating what the speeds of both bodies would be during contact? If one knows the speeds of both bodies before contact, can one calculate what the speeds would be when they come into contact before carrying out the actual experiment?

 

[Navin A S]

Thanks in advance!Unfortunately, the answer is no. The speed of the bodies during contact depends on the force of friction between them as well as their mass and shape. These factors are impossible to predict without actually carrying out the experiment.

 

[oswaler]

I can provide some insight into this question. In physics, velocity is defined as the rate of change of an object's position with respect to time. Therefore, the velocity of a body in motion can be calculated by dividing the distance traveled by the time it takes to travel that distance. In the case of a ring on block wear test, the speed of the ring and the block can be calculated separately using this formula.

However, when these two bodies come into contact, their velocities will change due to the forces acting on them. This change in velocity can be calculated using the laws of motion, specifically Newton's second law, which states that the net force acting on an object is equal to its mass multiplied by its acceleration. In this case, the forces of friction and impact between the ring and the block will cause a change in their velocities upon contact.

To predict the speeds of both bodies during contact, one would need to know the forces acting on them, as well as their masses and initial velocities. These can be calculated theoretically before carrying out the experiment, but the actual speeds may vary due to factors such as surface roughness and other variables. Therefore, it is important to conduct the experiment to determine the exact speeds and to validate the calculations.

In conclusion, the speeds of bodies in contact can be calculated using the principles of physics, but the actual speeds may vary due to real-world factors. The best approach is to conduct the experiment and use the calculated values as a guide for understanding the results.