Momentum
Gbogbo ọrọ náà
A loaded lorry rolling slowly can do far more damage than a fast tennis ball, and a rifle kicks backwards the instant a bullet leaves it. Both facts come from one powerful idea: momentum. It combines how much matter is moving with how fast it moves, and it obeys a conservation law that lets you predict what happens in collisions and explosions.
In this Supplement topic you will define momentum and impulse, link force to the rate of change of momentum, and use conservation of momentum to solve one-dimensional collision problems. You will also see why crumple zones and 'following through' in sport both come down to changing momentum over a longer or shorter time.
Ebumnobi
- [Supplement] Define momentum as mass × velocity; recall and use the equation p = mv
- [Supplement] Define impulse as force × time for which force acts; recall and use the equation impulse = F∆t = ∆(mv)
- [Supplement] Apply the principle of the conservation of momentum to solve simple problems in one dimension
- [Supplement] Define resultant force as the change in momentum per unit time; recall and use the equation ∆p F = ∆t
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Maapụ uche
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Akwụkwọ Ọmụmụ
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Nnyocha Ọmụmụ
Ekele diri gi maka imecha ihe karịrị na Momentum. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.
Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.
Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.
- The momentum of a 4 kg object moving at 5 m/s is: A. 0.8 kg m/s B. 20 kg m/s C. 9 kg m/s D. 1.25 kg m/s Answer: B
- Impulse is equal to: A. mass times acceleration B. force times distance C. the change in momentum D. mass times velocity squared Answer: C
- A 2 kg trolley at 6 m/s hits a stationary 4 kg trolley and they move off together. Their common velocity is: A. 6 m/s B. 3 m/s C. 2 m/s D. 12 m/s Answer: C
- Crumple zones reduce the force in a crash because they: A. increase the change in momentum B. increase the collision time C. reduce the mass of the car D. increase the speed of impact Answer: B
- A resultant force equals: A. momentum times time B. change in momentum per unit time C. mass per unit velocity D. velocity per unit time Answer: B
Rue ajuju ndi a n'ime ngwa ahu
Rue ajuju ndi a n'ime ngwa ahu
Akwụkwọ A Na-atụ Aro
Mụtakwuo ihe site na isi mmalite mepere emepe
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Akụkụ akwụkwọ
Linear Momentum, Force, and Impulse
Describe momentum, what can change momentum, impulse, and the impulse-momentum theorem
"Physics: Linear Momentum, Force, and Impulse" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/8-1-linear-momentum-force-and-impulse. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Akụkụ akwụkwọ
Elastic and Inelastic Collisions
Distinguish between elastic and inelastic collisions
"Physics: Elastic and Inelastic Collisions" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/8-3-elastic-and-inelastic-collisions. Access for free at https://openstax.org/books/physics/pages/1-introduction
Ndị otu ndị ọzọ bipụtara ha n'okpuru ikike mepere emepe, anyị na-ekele ha dị ka ha si chọọ. Njikọ na-emepe saịtị ha.
Meecha Ajụjụ Ule Ọmarịcha
Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Momentum? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.
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