Momentum
Muhtasari
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.
Malengo
- [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
Maelezo ya Somo
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Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Tathmini ya Somo
Hongera kwa kukamilisha somo la Momentum. Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.
Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.
Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.
- 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
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Inapatikana kwenye programu ya Green Bridge
Pakua programu ya Green Bridge CBT kwenye simu yako au kompyuta yako ili kupata maelezo kamili ya masomo, maswali ya mazoezi, na mengi zaidi.
Vitabu Vinavyopendekezwa
Fanya Mazoezi ya Maswali ya Majaribio
Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Momentum? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.
Pakua Programu Kwenye Google Playstore
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