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Combined Science: Physics

GCSE · Edexcel · foundation

QuestionsFlashcards

Expressing Quantities & SI Units
- Units & Prefixes
  8
- Conversions & Standard Form
  6

Atomic Structure
Radioactive Decay
Dangers of Radiation
- Dangers of Radiation
  5
- Contamination & Irradiation
  6

Magnetism
Electromagnetism & The Motor Effect
- Magnetic Fields in Wires
  6
- Magnetic Fields in Solenoids
  6

Transformers & the National Grid
- The National Grid
  5
- The Ideal Transformer Equation
  3

Weight, Mass & Gravity Flashcards

All 7 cards in this deck

Define weight.: The force acting on an object due to gravity (mass × gravitational field strength), measured in newtons.
In which direction does the weight of an object act?: Vertically downwards.
How is weight measured?: With a calibrated spring balance (newtonmeter), which reads the force in newtons.
What is the equation for weight?: weight (N) = mass (kg) × gravitational field strength (N/kg)
$W = m \times g$
True or false? An astronaut's mass changes when they travel to the Moon.: False. Mass stays the same; only the weight changes because the gravitational field strength is different.
What is the relationship between the weight of a body and the gravitational field strength?: Weight is directly proportional to the gravitational field strength (for a fixed mass).
What is mass, and what unit is it measured in?: The amount of matter in an object, measured in kilograms (kg).