How long will it take a car to go from a complete stop to 450 m/s if it is accelerating at 60.5 m/s2?

7.44 seconds

Explanation:

v = at + v₀

where v is the final velocity,

v₀ is the initial velocity,

a is the acceleration,

and t is time.

Given v = 450 m/s, v₀ = 0 m/s, and a = 60.5 m/s²:

450 = (60.5)t + 0

t ≈ 7.44

It takes approximately 7.44 seconds.

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