Question

1) which physical identify has the unit ms?​

Answer 1

m/s is the unit of velocity.

Explanation:

Velocity is defined as the rate of change of displacement or distance with reference to time.  

The formula of velocity is  

Δd/Δt

Where Δd is the change in displacement and is Δt is the change in the time period.

The unit of displacement is meter 'm' while the unit of time is 's'

Thus, m/s is the unit of velocity.