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 Evidence/example of action/reaction force pairs

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 Evidence/example of action/reaction force pairs

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In soccer when a player hits the ball with their head, there is an action and reaction force. The action force is the player hitting the ball with their head, and the reaction force is the ball pushing off the player’s head. Another action and reaction force pair is when the goalie catches the ball. The action is the ball hitting the goalie's hands, and the reaction is the goalie pushing the ball back.

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In the image above, the player kicks the ball which has balanced forces acting upon it, with tremendous force causing an unbalanced force to hit the ball, so the ball accelerates quickly. But as Newton’s Third Law states that for every action there is an equal and opposite reaction, so the ball accelerates at such a fast speed that when it hits the crossbar, the reaction kicks in, and the ball gets sent flying back. It shows that for every action with a net force not equal to zero, (the ball hitting the crossbar at a high speed) there is an equal and opposite reaction (the ball bouncing off the crossbar).

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In the first picture, the player is kicking the ball. While the player is kicking the ball, the ball is reacting to the player's action, and is actually pushing back on the player. The only reason the player doesn't feel this is because the mass of the player's leg is greater than the mass of the soccer ball. In the second picture, the ball seems like it is standing still, but the ball is actually pushing on the ground, and the ground reacts the the ball by pushing back onto the ball.

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For every action there is an equal and opposite reaction.

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Evidence/example of the relationship between acceleration, mass, and force

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Evidence/example of the relationship between acceleration, mass, and force

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In the picture, there is evidence of Newton’s second Law of Motion, and there is also evidence of a relationship between acceleration, mass and force. In the picture, the person kicks the ball with a lot of force. Since the mass of the ball is not much, the acceleration of the ball will be greater as acceleration=force/mass. So the more the force is, and the less the mass is, the greater the acceleration will be.

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A soccer ball has less mass than a bowling ball, so when a soccer player kicks a soccer ball, with a great force, that force is more than the soccer ball’s mass, so the ball will travel in a greater acceleration. If the ball had more mass, and the player kicked a bowling ball instead, the bowling ball would travel less distance, as it has a greater mass. Therefore Newton’s Second Law of Motion is applied.

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Newton’s Second Law of Motion states that the force of an object is the mass times the acceleration. In this case, the soccer player is kicking the soccer ball with a great force. That force is more than the soccer ball’s mass, so the ball will travel in a greater acceleration. When the baby kicks the soccer ball, he kicks the ball with much less force, so the ball doesn't travel nearly as far as it does when the grown man does.

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The force of an object is the mass times the acceleration.

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Evidence/example of balanced/unbalanced forces at work:

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Evidence/example of balanced/unbalanced forces at work:

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In soccer, there are balanced and unbalanced forces at work. One example of a balanced force in soccer is when the soccer ball is still on the ground. When the ball is standing still, there are balanced forces acting on it, so it does not move. But when a person kicks the ball, the ball starts to go in motion. This means that an unbalanced force has acted upon it.

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Evidence/example of the effects of friction:

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Evidence/example of the effects of friction:

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There is also a lot of friction in the sport of soccer. After all, friction is what prevents the soccer ball from going forward forever when it is kicked. The soccer ball rubs against the ground, which causes resistance and slows the ball down. This affects how hard you have to kick the ball. If there is more friction on the ball, you need to kick it harder for the ball to a certain distance, but if you play on a ground with less resistance than a soccer field, it will require less power to kick the ball the same certain distance.

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In soccer, there is evidence of an inertia/mass relationship. When you kick the soccer ball, the ball actually kicks back at your foot just as hard. The only reason you don’t feel it is because your legs have more mass than the ball, meaning there will be more inertia. The more inertia an object has, the greater the mass of the object is because there is a greater tendency to resist changes in its state of motion, which is basically what inertia is.

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What is happening in the second picture that shows Newton's First Law?

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What is happening in the second picture that shows Newton's First Law?

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When the soccer ball is kicked, it goes in a constant velocity, until it hits the soccer net. Newton’s First Law also states that an object in motion stays in motion with the same velocity unless it is acted upon by an unbalanced force. In this example, the soccer ball travels in a constant velocity until it is stopped by an unbalanced force, which is the net.

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What is happening in the first picture that shows Newton's First Law?

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What is happening in the first picture that shows Newton's First Law?

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Newton’s First Law states that an object at rest stays at rest, and an object in motion stays in motion with the same velocity unless it is acted upon by an unbalanced force. In this case, the soccer ball is at rest with no unbalanced forces actin upon it, until an unbalanced force (the foot kicking the ball) hits the ball. When the unbalanced force hits the ball, the ball starts moving.

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Kicking a football soccer ball slomo.  Toe down goal kick

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An object at rest stays at rest, and an object in motion stays in motion with the same velocity unless it is acted upon by an unbalanced force.