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(a) A railway carriage moving without jerks between two stations.Ans: As the size of a carriage is very small as compared to the distance between two stations, the carriage can be treated as a point sized object. (b)...
· 1st Law: Object remains at rest or uniform motion unless a force acts. (e.g., passenger jerks forward in braking car)· 2nd Law: F=ma - Acceleration is proportional to force. (e.g., heavier carts n...
Let object start with velocity u and constant acceleration a Using area under v–t graph:1. v=u+at2. s=ut+1/2at^2 3. v^2=u^2+2as All derived using geometric interpretation of motion.
Theorem: Work done = Change in kinetic energy W=ΔKE=1/2mv^2−1/2mu^2 Conservative Forces: Path-independent (e.g., gravity) Non-Conservative Forces: Path-dependent (e.g., friction)
Significant figures are digits in a number that contribute to its precision. Rules:· All non-zero digits are significant.· Zeros between non-zero digits are significant.· Leading zeros are no...
[MLT^–2] – Derived using F = ma (mass × acceleration)
Physics is the foundation of all technological developments. Applications like satellites (based on gravitation), electronics (semiconductors), electricity (electromagnetism), medical imaging (X-rays, MRI), and nuclea...
Mechanics
Matter and energy – Physics explains the fundamental laws governing matter, energy, space, and time.
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