This one is for 25, the next will be 30

a = -1.833 m/s²

Explanation:

Acceleration is the change in velocity over change in time, so you will use a = Δv/Δt or you can also use a = (v-v0)/t, both means the same thing, and I will show you how to use the latter equation.

a = average acceleration

v = final velocity = 7 m/s

v0 = initial velocity = 18 m/s

t = time = 6 s

a = (v-v0)/t

a = (7m/s - 18m/s) / 6s

a = -1.833 m/s²

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

a skateboard rolling across the street - apex