In order to produce a magnetic field an electric charge must be

In order to produce a magnetic field an electric charge must be in movement.

Explanation:

A magnetic field is generated by the movement of a charged particle in the space around it, as can be seen in the following equation:    

 (1)   

Where F is the magnetic force, q is the charge of the particle, v is its velocity and is the angle between B and v.    

Therefore, in order to produce a magnetic field, it is necessary for the electric charge to be in movement.

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer

answer///isobars;