Mechanics
Learn the key concepts of Mechanics for A/L Physics, explained simply · Aligned with the NIE syllabus
Where this fits in the syllabus
Grade 1 · Term 1
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Learn the key concepts of Mechanics for A/L Physics, explained simply
About A/L Physics: The A/L Physics syllabus is structured across two academic years, covering fundamental and advanced topics in mechanics, waves, electricity, and modern physics. Every topic on Idasara Academy is mapped directly to the NIE curriculum.
Work (W)
The product of force and displacement in the direction of the force.
Work is done only when a force causes a displacement. If the force is perpendicular to displacement, no work is done. For example, carrying a bag horizontally — the vertical force of your hand does no work on the bag (displacement is horizontal). Work is a scalar quantity, measured in joules (J).
Kinetic Energy (K)
The energy an object possesses due to its motion.
A moving object can do work when it slows down. Kinetic energy depends on mass and the square of speed: doubling speed quadruples kinetic energy. A car at 80 km/h has four times the kinetic energy of the same car at 40 km/h — this explains why braking distances increase dramatically with speed.
Source: Idasara knowledge pack — english/AL_SCIENCE/physics v19, short_notes: Lesson 2.4 - Work, Energy & Power
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