How long were the articles of confederation in effect

Newton's second law states that the force produced by a moving object depends on its mass and acceleration. Which is an example of this? Two boulders move at the same rate of acceleration; the boulder with the smaller mass produces a greater force.

Two boulders move at the same rate of acceleration; the boulder with the greater mass produces a greater force.

A runner accelerates at a rate of 1 meter per second per second during a race.

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