Physics (9-1) - 0972 CIE

Momentum

Bayani Gaba-gaba

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.

Manufura

[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

Takardar Darasi

Momentum explains crashes, rockets, recoil and sport. Crumple zones, air bags and catching a ball gently all work by controlling how quickly momentum changes. In the exam, momentum is a reliable source of calculation marks: you are expected to use \( p = mv \), conservation of momentum, and the force equation confidently.

Akwai a cikin manhajar Green Bridge

Zazzage manhajar Green Bridge CBT a wayar ka ko kwamfyuta ka don samun cikakkiyar bayanan darasi, tambayoyin aiki, da ƙari.

Cikakkiyar bayanan darasi tare da zane-zane

Mataimakiyar koyo da AI

Yi karatu ba tare da intanet ba, a kowane lokaci, a ko'ina

Zazzage manhajar wayar hannu Zazzage manhajar kwamfyuta

Akwai a Android, Windows, macOS, da Linux

Nazarin Darasi

Barka da kammala darasi akan Momentum. Yanzu da kuka bincika mahimman raayoyi da raayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.

Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.

Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.

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