sci_phy
Scalars and Vectors
Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.
Free online summary and notes (ICSE Class 10 Hindi). Read it here, no PDF download needed.
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Physics · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)
Summary
Mass 2 kg is complete on its own. A force of 5 N is not complete until you say which way.
Walk 3 m east then 3 m west: distance is 6 m, but displacement is zero.
A car going round a roundabout at steady speed still has changing velocity, because its direction changes.
For two vectors at right angles, use Pythagoras: R = sqrt(A squared + B squared).
Hard words & meanings
| scalar | a quantity with magnitude (size) only and no direction |
| vector | a quantity with both magnitude and direction |
| magnitude | the size or amount of a quantity, ignoring direction |
| distance | the total length of path travelled; a scalar |
| displacement | the straight-line change in position with direction; a vector |
| velocity | rate of change of displacement; speed in a stated direction; a vector |
| resultant | the single vector that has the same effect as two or more combined vectors |
| head-to-tail | a method of adding vectors by drawing each one starting from the tip of the last |
Model exam answers, grammar & audio
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