How do Newton's laws of motion explain the importance of maintaining a smooth surface on a hockey rink to enable players to pass the puck quickly? Smooth ice reduces friction, allowing the puck to maintain its motion with less force. It minimizes resistance, meaning less force is required to accelerate the puck. Smooth ice also reduces the disruptive forces that could decelerate the puck. Lastly, a sleek surface decreases the reaction force exerted by the ice on the puck, facilitating faster movement.

Physics · Middle School · Thu Feb 04 2021

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Answer: Newton's laws of motion are fundamental to understanding the motion of objects, including a hockey puck on an ice rink. The relevance of maintaining a smooth surface on a hockey rink can be explained by these laws as follows:

1. Newton's First Law (The Law of Inertia): This law states that an object at rest will stay at rest and an object in motion will continue in motion with the same speed and in the same direction unless acted upon by an unbalanced force. A smooth and well-maintained ice surface minimizes the amount of friction between the puck and the ice. With less friction, the puck will maintain its motion for a longer duration without the need for additional forces to be applied. This allows players to pass the puck quickly and with precision.

2. Newton's Second Law (The Law of Acceleration): This law states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. When ice is smooth, the frictional force is reduced, which means that a smaller force is required to accelerate the puck to a given speed. In practice, players can pass the puck more effectively as less effort is required to overcome the forces of friction.

3. Newton's Third Law (The Law of Action and Reaction): This law states that for every action, there is an equal and opposite reaction. When a puck slides across ice, there is a reactionary force from the ice on the puck; this is the friction force. If the surface is rough, this reaction force is greater, slowing down the puck. On a smooth surface, this reaction force is less, enabling the puck to glide more freely and maintain higher speeds for faster gameplay.

Extra: To expand on the topic, Newton's laws of motion highlight the interplay of forces, mass, and acceleration. These concepts are critical in sports like hockey where understanding and controlling physical forces can make the difference in the dynamics of the game.

1. Inertia and Friction: Ice rinks are polished to reduce the puck's inertia or tendency to resist changes in its state of motion. Friction is the resisting force encountered in any motion, and in hockey, it's mainly the force between the puck and the ice surface. Smooth ice means lower friction leading to increased puck velocity for the same input force.

2. Force and Acceleration: Forces cause changes in the motion of objects. The smoother the ice, the more efficiently the players' forces on their sticks will translate to accelerating the puck. This not only allows for fast play but also means players can use their energy more effectively over time.

3. Action-Reaction Pairs: Every interaction involves forces between two objects, creating a pair of forces that are equal in magnitude and opposite in direction. The reaction force that the ice provides influences the puck's motion, but a smooth surface ensures that this force does not hinder the puck's speed unnecessarily.

These physical principles are crucial in the design and maintenance of sports equipment and play surfaces. In hockey, optimizing these factors through a smooth surface allows the intricate play strategies to unfold with fewer physical limitations.