1. When the marble is released from the left side and the inclinations of the planes on both sides are equal, it will roll down the left plane, gain speed, and then ascend the right plane to the same height from which it was released.

    When the marble is released from the left side and the inclinations of the planes on both sides are equal, it will roll down the left plane, gain speed, and then ascend the right plane to the same height from which it was released.

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  2. It is difficult to achieve a zero unbalanced force in practical situations because factors like friction, air resistance, and other external influences constantly act on objects, preventing them from maintaining perfect uniform motion without an external force.

    It is difficult to achieve a zero unbalanced force in practical situations because factors like friction, air resistance, and other external influences constantly act on objects, preventing them from maintaining perfect uniform motion without an external force.

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  3. Galileo’s thought experiment suggests that an external force is not needed to sustain uniform motion. Once an object is in motion, it will continue moving at a constant velocity in a straight line unless acted upon by an external force, such as friction.

    Galileo’s thought experiment suggests that an external force is not needed to sustain uniform motion. Once an object is in motion, it will continue moving at a constant velocity in a straight line unless acted upon by an external force, such as friction.

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