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Physical Education [3/4] Question Thread
AmyDottie:
Hi,
Can someone please give an example relating to each of the 3 of Newton's Laws in a footy kick?
EXAMPLE
1st Law can be seen as ball continues travelling in a horizontal range until it is acted upon by external force, gravity
Poet:
--- Quote from: AmyDottie on March 25, 2019, 07:54:01 pm ---Hi,
Can someone please give an example relating to each of the 3 of Newton's Laws in a footy kick?
EXAMPLE
1st Law can be seen as ball continues travelling in a horizontal range until it is acted upon by external force, gravity
--- End quote ---
Hi Amy,
You've got the first law right, that's a decent example.
It may be easier for you to simplify the laws before finding examples. So, Newton's first law is the law of inertia. The second law is the law of force. The third is that, for every action, there is an equal and opposite reaction, almost like a trade in energy.
In football, we can see inertia in the way a ball flies, it's trajectory, when kicked. The trajectory will curve and/or be interrupted by external forces such as gravity or another player.
Force, which is calculated by mass x acceleration, can be shown when the ball is hit. Coming into contact with the athlete's foot, which has large mass and force, will generate acceleration in the ball which will create a successful kick.
Newton's Third Law is displayed by the act of kicking the football, (the physical meeting of the player's foot and the ball) where equal force from the other will be placed on both the ball and the player's foot. However, the football's mass is much less than that of the player, making the acceleration of the ball much greater and thus much more noticeable in comparison to the athlete.
This is not to say there is no reaction, but it is much less visible.
Hope this helps :)
AmyDottie:
Hi Poet,
Thank you so much. I got the first 2, but could you explain the 3 one a little differently. I dont understand it
Poet:
--- Quote from: AmyDottie on March 25, 2019, 11:15:44 pm ---Hi Poet,
Thank you so much. I got the first 2, but could you explain the 3 one a little differently. I dont understand it
--- End quote ---
Alright, so imagine the process of kicking a ball in footy. A classic drop-kick involves letting the ball fall while bringing your leg up to meet it. When your foot hits the ball, both feel the impact. Newton's law of action and reaction can be seen when the ball and foot meet. Both feel the effects of meeting each other, but because a person's leg is so much more massive, it will only slow, while the ball will change direction and trajectory completely.
Here's a short clip on Newton's third law. It might help you a little more to think of kicking a ball a like gun recoil. :)
AmyDottie:
--- Quote from: Poet on March 25, 2019, 11:38:09 pm --- Alright, so imagine the process of kicking a ball in footy. A classic drop-kick involves letting the ball fall while bringing your leg up to meet it. When your foot hits the ball, both feel the impact. Newton's law of action and reaction can be seen when the ball and foot meet. Both feel the effects of meeting each other, but because a person's leg is so much more massive, it will only slow, while the ball will change direction and trajectory completely.
Here's a short clip on Newton's third law. It might help you a little more to think of kicking a ball a like gun recoil. :)
--- End quote ---
thanksss
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