michelle is peadling down a steep hill on her bicycle and wants to be ablet to coast up the next hill which is 25.0 meters high, without pedaling up the hill at all. assuming her bicycle is 100% efficient her speed would be at least​

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

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a) electrical > light, sound, and thermal< < < <

) the mechanical energy of the firefighter moving.< < < < a) electrical > light, sound, and thermal< < < <

c) both a and b.

no. dot product   =0 when vecs at right angles

im guessing the west of station b