Topic 1. Physical quantities and units
Heinemann Chapter Measurement | |
File Size: | 1297 kb |
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Vectors & Scalars
A scalar quantity has a magnitude only. It is completely described by a certain number and a unit.Examples include: Distance, speed, mass, time, temperature, work done, kinetic energy, pressure, power, electric charge etc.
A vector quantity has both magnitude and direction. It can be described by an arrow whose length represents the magnitude of the vector and the arrow-head represents the direction of the vector.
Examples include: Displacement, velocity, moments (or torque), momentum, force, electric field etc.
A vector quantity has both magnitude and direction. It can be described by an arrow whose length represents the magnitude of the vector and the arrow-head represents the direction of the vector.
Examples include: Displacement, velocity, moments (or torque), momentum, force, electric field etc.
Vector Addition Model
This simulation gives students a chance to practice two-dimensional vector addition in an interactive format with immediate feedback. The magnitude and direction of two vectors are given; the students' task is to determine x and y components, length of the two vectors, and the resultant sum.
This simulation gives students a chance to practice two-dimensional vector addition in an interactive format with immediate feedback. The magnitude and direction of two vectors are given; the students' task is to determine x and y components, length of the two vectors, and the resultant sum.