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Albert pushes a 12-kg box across a level floor. he pushes with a force of 49 newtons, and observes that the box accelerates in the direction of his push at a rate of 3 m/s2. what must be the net force acting on the box?

Respuesta :

Newton's second law of motion states that the resultant force is directly proportional to the rate of change in momentum. This gives us the formula,
The resultant force (F)= Ma, where m is the mass, and a is the acceleration.
Therefore;
F = 12 (3)
    = 36 N
Albert applied a force of 49 N to the box but due to friction force only 36 N of the force made the object to move.
Thus the net force was 36 N

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