1. We need to start pedaling again to keep the bicycle moving because friction and air resistance act as unbalanced forces, gradually slowing the bike down. Pedaling provides the necessary force to counteract these resistances and maintain motion.

    We need to start pedaling again to keep the bicycle moving because friction and air resistance act as unbalanced forces, gradually slowing the bike down. Pedaling provides the necessary force to counteract these resistances and maintain motion.

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  2. When we stop pedaling, friction and air resistance gradually slow down the bicycle. Without the continuous force from pedaling to counteract these resistances, the bicycle eventually comes to a stop.

    When we stop pedaling, friction and air resistance gradually slow down the bicycle. Without the continuous force from pedaling to counteract these resistances, the bicycle eventually comes to a stop.

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  3. When children push the box with a force greater than the friction force, the box accelerates in the direction of the applied force. This unbalanced force overcomes friction, causing the box to move.

    When children push the box with a force greater than the friction force, the box accelerates in the direction of the applied force. This unbalanced force overcomes friction, causing the box to move.

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  4. From Galileo's experiment with the marble on inclined planes, the principle of conservation of mechanical energy can be inferred. The marble's ability to reach the same height on the opposite side (when slopes are symmetrical) illustrates that its potential energy at the top is converted into kinetiRead more

    From Galileo’s experiment with the marble on inclined planes, the principle of conservation of mechanical energy can be inferred. The marble’s ability to reach the same height on the opposite side (when slopes are symmetrical) illustrates that its potential energy at the top is converted into kinetic energy as it descends, and this energy remains constant in the absence of external forces.

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  5. Gradually decreasing the angle of inclination of the right-side plane reduces the vertical component of the marble's gravitational force. This decreases its potential energy converted into kinetic energy, causing the marble to travel a longer horizontal distance before friction and air resistance evRead more

    Gradually decreasing the angle of inclination of the right-side plane reduces the vertical component of the marble’s gravitational force. This decreases its potential energy converted into kinetic energy, causing the marble to travel a longer horizontal distance before friction and air resistance eventually bring it to a stop.

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