Physics !
1. on the graph above, what is the total displacement during the time interval 0s-8s?
a.) 0.6 m
b.) 5.0 m (my answer)
c.) 2.0 m
d.) 10.0 m
2.) on the graph above, what is the instantaneous velocity?
a.) the slope of the line at any point in time. (my answer)
b.) the difference between the final and initial displacement.
c.) the displacement divided by the time interval.
d.) the difference between the final and initial time.

1. B

2. A

Explanation:

1. The displacement is the change in position.  At t = 0, x = 1.0.  At t = 8.0, x = 6.0.  So from t=0 to t=8, Δx = 6.0 − 1.0 = 5.0.

2. The instantaneous velocity is the slope of the tangent line at any point of a position vs. time graph.

The average velocity is the displacement divided by the time interval.

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

i don't understand. explain it clearly