Question

The following is an example of uniform velocity?
1) The motion of a ball rolling down a hill.
2) a train starting and moving out of the station.
3) when light travels through vacuum. ​

Answer 1

Answer:

The following is an example of uniform velocity?

when light travels through vacuum.

Are you a malayali?

Answer 2

3) When light travels through vacuum is an example of uniform velocity.

Explanation:

• Uniform velocity is when the magnitude and direction of velocity changes.

• The velocity of light is constant in vacuum which is $3*10^{8} m/s$.

• A vacuum is empty space. There are no molecules of air or anything else in  a vacuum.

• Uniform velocity is when there is no change in magnitude of speed i.e. it covers equal distance in equal intervals of time.

• Like all forms of electromagnetic waves, light can travel through empty space, as well as through  matter.

• Light travels with uniform velocity as there is no acceleration acting on it.

• The motion of a ball rolling down a hill has non uniform velocity as acceleration of gravity acts on it.

• A train starting or moving out of the station  is also a non-uniform velocity example because it experience acceleration while starting.