I have one reason the reaction take place faster because the molecules are going at a faster pace because the temperature is rising
The resultant force is 5N.So the box moves to right with constant acceleration.
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13 g —> 0.013 kg
KE = 1/2(m)(v)^2
KE = 1/2(0.013)(8.5)^2
KE = 0.47 J
Answer - There are three ways an object can accelerate: a change in velocity, a change in direction, or a change in both velocity and direction.