his: - Set up quarters so that four are stacked on top of each other. Take another quarter and apply a force with your finger or hand to slide it towards the stack What happens? . What happens when you slide 2 quarters into a stack of 4? . What happens when you slide 4 quarters into 4? . What happen when you slide 4 quarters into 2? ver the following question: . Explain your observations in terms of Newton's 1^st law using force inertia, rest unbalanced forces. exert an outside Porce on the querters that

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his: - Set up quarters so that four are stacked on top of each other. Take another quarter and apply a force with your finger or hand to slide it towards the stack What happens? . What happens when you slide 2 quarters into a stack of 4? . What happens when you slide 4 quarters into 4? . What happen when you slide 4 quarters into 2? ver the following question: . Explain your observations in terms of Newton's 1^st law using force inertia, rest unbalanced forces. exert an outside Porce on the querters that

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Here's an analysis of the quarter-sliding experiment and an explanation using Newton's First Law:**Observations:*** **Sliding 1 quarter into a stack of 4:** The single quarter likely transfers its momentum to the bottom quarter(s) of the stack, causing the bottom one or two quarters to slide out. The rest of the stack remains largely undisturbed.* **Sliding 2 quarters into a stack of 4:** Similar to the first scenario, the two sliding quarters transfer their momentum. More quarters from the bottom of the stack are likely to be ejected.* **Sliding 4 quarters into a stack of 4:** The impact is more significant. A larger portion, possibly all, of the stationary quarters will be ejected from the original stack.* **Sliding 4 quarters into a stack of 2:** The two quarters in the smaller stack will almost certainly be ejected with more force and travel further than in the previous scenarios.**Explanation using Newton's First Law:**Newton's First Law of Motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Inertia is the tendency of an object to resist changes in its state of motion.In this experiment, the stacked quarters are initially at rest. They possess inertia, meaning they tend to stay at rest. The sliding quarters are in motion. They also possess inertia, tending to continue moving in a straight line.When the sliding quarters collide with the stack, they exert an *unbalanced force* on the stationary quarters. This force overcomes the inertia of the bottom quarters in the stack. The momentum (mass times velocity) of the moving quarters is transferred to the stationary ones.Because the bottom quarters experience this unbalanced force, they are set into motion. The greater the mass or velocity of the sliding quarters (or the smaller the mass of the stationary stack), the greater the unbalanced force and the more quarters will be ejected from the stack. The ejected quarters continue to slide until friction with the surface (another unbalanced force) brings them to rest.**Key Terms and Concepts:*** **Unbalanced Force:** A force that causes a change in an object's motion (either starts it moving, stops it, or changes its direction/speed).* **Inertia:** The resistance of an object to changes in its state of motion.* **Momentum:** The product of an object's mass and velocity.* **Newton's First Law:** An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.* **Force:** A push or a pull that can cause a change in motion.* **Rest:** A state of no motion.

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