Physics - 4PH1 PearsonEdexcel

Forces And Motion: Units

Bayani Gaba-gaba

Physics problems fall apart when the units are wrong. A speed given in kilometres per hour cannot be plugged straight into an equation that expects metres per second, and a force stated without its unit is just a number. Knowing which unit belongs to which quantity is the first step in every calculation.

This reference covers the nine SI and derived units you need for the Forces and motion section of the Edexcel specification: kilogram, metre, metre per second, metre per second squared, newton, second, newton per kilogram, newton metre, and kilogram metre per second. You will practise recalling them quickly and converting between related forms.

Manufura

  1. Use the following units: kilogram (kg), metre (m), metre/second (m/s), metre/second2 (m/s2), newton (N), second (s) and newton/kilogram (N/kg)
  2. Use the following units: newton metre (Nm), kilogram metre/second (kg m/s)

Takardar Darasi

Every physical quantity has a number and a unit. Writing \(F = 12\) tells a reader nothing; writing \(F = 12\;\text{N}\) tells them the force is twelve newtons. Examiners award marks for correct units alongside correct arithmetic, so building the habit now pays off in every paper.

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Nazarin Darasi

Barka da kammala darasi akan Forces And Motion: Units. 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.

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  1. What is the SI unit of force? A) kg B) m/s C) N D) J Answer: C
  2. Which unit measures gravitational field strength? A) N B) N/kg C) kg m/s D) m/s2 Answer: B
  3. Momentum is measured in: A) N m B) kg m/s2 C) kg m/s D) N/kg Answer: C
  4. A speed of 90 km/h is equivalent to: A) 9 m/s B) 25 m/s C) 90 m/s D) 250 m/s Answer: B
  5. The moment of a force is measured in: A) N B) N/kg C) N m D) kg m/s Answer: C

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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
Akwai a Android, Windows, macOS, da Linux

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