Can Velocity Alone Determine an Object's Mass?

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Determining an object's mass solely from its velocity is not feasible, as mass cannot be inferred without considering force, density, or momentum. Objects of different masses can move at the same speed, making velocity an unreliable indicator of mass. The discussion highlights that all objects experience gravity similarly, and their motion is not dependent on mass. While one can estimate the mass of celestial bodies like Earth through the orbits of surrounding objects, this involves gravitational principles rather than velocity alone. Ultimately, mass determination requires a more comprehensive understanding of physical laws, including Newton's Laws of motion.
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Is it possible to find the mass without force/density/momentum but with velocity only?
 
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John Clement Husain said:
Is it possible to find the mass without force/density/momentum but with velocity only?

You mean, for example, if something is moving at ##1m/s## then it must have a mass of ##7.4kg##?
 
something like this:
An object, with a distance of 1300 km, in space is moving in 100 km in 10 s towards Earth, find it's mass.
 
John Clement Husain said:
something like this:
An object, with a distance of 1300 km, in space is moving in 100 km in 10 s towards Earth, find it's mass.

Why would that determine its mass? Why couldn't a small object (a rock) and a large object (an asteroid) be moving at the same speed?

In particular, all objects are affected by gravity to the same extent. Their trajectories or orbits do not depend on their mass.

You could, however, estimate the mass of the Earth from looking at the orbits of things moving around it or things falling towards it.
 
nope
 
PeroK said:
Why would that determine its mass? Why couldn't a small object (a rock) and a large object (an asteroid) be moving at the same speed?

In particular, all objects are affected by gravity to the same extent. Their trajectories or orbits do not depend on their mass.

You could, however, estimate the mass of the Earth from looking at the orbits of things moving around it or things falling towards it.
you mean Kepler's Third law?
 
John Clement Husain said:
you mean Kepler's Third law?

More fundamentally the acceleration of gravity is independent of the accelerated mass.
 
John Clement Husain said:
something like this:
An object, with a distance of 1300 km, in space is moving in 100 km in 10 s towards Earth, find it's mass.
How would that tie in with Newton's Laws of motion?
 

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