The discussion centers around the conditions under which the three equations of motion, commonly referred to as the SUVAT equations, can be applied. Participants explore whether it is necessary for the object in question to be treated as a point object and the implications of this assumption on calculations involving motion.
Participants express differing views on whether the body must be a point object for the SUVAT equations to be applicable. While some assert that it is not necessary, others highlight the complications that arise when dealing with non-point objects, indicating that the discussion remains unresolved regarding the implications of this distinction.
There are limitations in the discussion regarding the assumptions made about the nature of the objects involved and the potential complexities introduced by their physical characteristics, such as flexibility and rotation.
I mean these:Orodruin said:What do you mean by "three equations of motion"? Equations of motion generally just refer to the equations that describe how a system evolves with time, it does not have to refer to a particular system and the equations will look different depending on the system.
So there is no condition on the body, right? That the body has to be a point mass or something?Orodruin said:The suvat equations are valid for situations with constant acceleration.
kay said:So there is no condition on the body, right? That the body has to be a point mass or something?
No, it is not necessary for the body to be a point object- however, if it is not, the calculations are a bit harder- you will have to consider how the various parts of the body move relative to each other. If the object is flexible, that could be complicated! Even if the body is rigid, you would need to include possible rotation about the center of mass.kay said:When can we use the three equations of motion?
Also, Is it necessary for the body we are considering to be a point object?