# Newton's Laws

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• Newton's First Law in Football
• Tom: When we kick it, it will keep going forward unless acted on by an outside force!
• Lisa: When the ball is resting on the ground, it will stay resting unless a force applied on it!
• Newton's Second Law in Football
• Tom: How do you run so fast?
• Anna: Because I am lighter than you.
• Newton's Third Law in Football
• Anna: Tom, pass!
• Based on the rules of the game, only force that could be applied on it to make it move is muscular because you have to use your muscular force when kicking. Your feet and the ball will contain friction when you touch it to kick it. Forces that can be used to stop the ball are friction, because friction will stop the ball as it slows things down, unless it hits a net or a goalkeeper catches it before friction could stop it.
• Newton's second law states that force= mass*acceleration. That is why lighter people can run faster than heavier people. Tom is 50 kg and his acceleration is 1.5 m/s/s, that means he is using 75N to run while Anna is 40 kg and her acceleration is 2.4 m/s/s, that means she is using 96N, so she can run faster because she is applying more force and she has less mass. Another use of second law can be that the mass of the ball affects how much it accelerates and the force used to kick it.
• Newton's third law says that every action has an equal and opposite reaction. So when Tom passes it to Anna, when he pushes the ball, it is the action and the ball pushes back at him, that is the reaction. It pushes with the same force in the opposite diction, but Tom barely can feel it, because he has much more mass than the ball. Tom pushes the ball with 100N and he is 50kg, while the ball also uses 100N and it's mass is 0.4kg. The ball accelerates with 2.0m/s/s while Tom accelerates only 0.25m/s/s, that is why he barely can feel it.
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