Speed is always the speed relative to something else.
If you see something standing still, that just means that it's moving
with exactly the same speed and direction that you are. The object that's
standing still could be the book in your lap in a seat on a passenger jet
flying at 500 miles per hour, relative to the ground, to visit your grandmother.
And don't forget that the airplane, you, and the book, are all spinning along
with the Earth, while the Earth and all of those things revolve around the sun.
There's no such thing as really standing still.
When an object is still it has no momentum. That is, the momentum is zero.
Velocity
They are the exact same. If an object is standing still, it is in motion. Everything in the world is in motion. Not because of the earth moving, it is because particles in all objects are moving.
If there are any forces acting on a stationary object, then they must be balanced, or it would no longer remain stationary.It is also possible that the object is already moving. In the forces are balanced on a moving object, the object would continue moving at the same speed and direction (velocity) that it already had.
Velocity is defined as the rate of change of the position of an object in relation to the specification of its speed and direction of motion. Therefore, an object at rest will have zero velocity.
Its speed, velocity, and acceleration are all zero.
When an object is still it has no momentum. That is, the momentum is zero.
Velocity. When an object is standing still at position p, the velocity dp/dt = 0 is zero.
Velocity
I suppose the forces may crush the object, but they won't move it.
No. If the horizontal axis is time, and the vertical axis is speed, and you're standing still,Then the graph is perfectly horizontal, and it coincides with the horizontal axis.
They are the exact same. If an object is standing still, it is in motion. Everything in the world is in motion. Not because of the earth moving, it is because particles in all objects are moving.
If there are any forces acting on a stationary object, then they must be balanced, or it would no longer remain stationary.It is also possible that the object is already moving. In the forces are balanced on a moving object, the object would continue moving at the same speed and direction (velocity) that it already had.
They may crush it, but they won't move it.
Velocity is defined as the rate of change of the position of an object in relation to the specification of its speed and direction of motion. Therefore, an object at rest will have zero velocity.
It is the speed of neutrinos. Why they are faster than the speed of light? Ckeck results of recent LHC experiments.
-- kinetic energy -- momentum -- velocity -- speed -- Lorentz contraction -- time dilation -- v2/c2 -- probability of arrival of a bus within the next 5 minutes