how many calories in a box of popcorn
What is Newton’s third law?
Newton’s third law tells us thats occur in pairs, one an action and the other a reaction force. The pair of forces involved in hitting the bag can be huge. But when the boxer hits a piece of tissue paper in midair, the pair of forces is tiny.
Can a mass bag hit something harder than that something can hit back?
For the massive bag and tissue paper, the answer is obvious. For smaller differences in mass, the same principle applies: You cannot hit something harder than that something can hit back. A force cannot exist without an equal and opposite reaction force. That’s the law.
What happens when a boxer hits a punching bag?
When a boxer hits a massive punching bag, his gloved fist hits the bag ( and dents it) while the bag hits back on the fist (and stops its motion). Newton’s third law tells us that forces occur in pairs, one an action force and the other a reaction force. The pair of forces involved in hitting the bag can be huge.
Can a force exist without an equal and opposite reaction force?
A force cannot exist without an equal and opposite reaction force . That’s the law. In this case, knowledge of the law is very helpful.
What does extended time of contact mean?
If the truck slams into a haystack, the extended time of contact means that the force is correspondingly small. On the other hand, if the truck slams into a massive wall, the time of contact is short and the force of impact is huge. This is common sense, and no structured thinking is needed in choosing the haystack.
Is boxing physics common sense?
Any physics I applied to boxing was merely common sense. Today, I like to say that physics is structured common sense. As an exle, everybody knows that if you’re in a fast-moving, out-of-control truck that can be stopped only by hitting a haystack or hitting a brick wall, the haystack is the obvious choice.
What is the momentum of a punch?
Another point about momentum: The momentum of a punch is not the mass of the fist times its velocity, but rather the mass of part of the boxer’s body multiplied by the velocity of the fist.
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