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For any object to be at rest the Forces acting on it must be EQUAL in magnitude and OPPOSITE in direction.
Since the cardboard is at rest we know that it is not experiencing any acceleration, hence, the net forces acting on it add up to zero (in magnitude and direction). Force equals mass times acceleration.
answer
answer
answer
answer
you will know the answer if you visualize it
For any object to be at rest the Forces acting on it must be EQUAL in magnitude and OPPOSITE in direction.
Since the cardboard is at rest we know that it is not experiencing any acceleration, hence, the net forces acting on it add up to zero (in magnitude and direction). Force equals mass times acceleration.
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Two forces acting in the same direction add together. If those two forces are acting on an object, the object will accelerate faster than if there was only one force acting on the object.
The net force resulting from two forces acting in the same direction is the sum of their magnitudes, and continues to act in the same direction.
their magnitudes are added together, resulting in a stronger force