Forces And Motion: Units
Akopọ
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.
Awọn Afojusun
- 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)
- Use the following units: newton metre (Nm), kilogram metre/second (kg m/s)
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- What is the SI unit of force? A) kg B) m/s C) N D) J Answer: C
- Which unit measures gravitational field strength? A) N B) N/kg C) kg m/s D) m/s2 Answer: B
- Momentum is measured in: A) N m B) kg m/s2 C) kg m/s D) N/kg Answer: C
- 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
- The moment of a force is measured in: A) N B) N/kg C) N m D) kg m/s Answer: C
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
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