Which is a vald velocity for an object?
45m/s
45m/s north
0m/s south
0m/s

45m/s north

Explanation:

Velocity is a vector quality because it is a change of displacement with time. Displacement talks about distance in a specific direction.

45m/s North tell us that the velocity is towards the north

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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