Unit I PROPERTIES OF RIGID BODY AND FLUIDS

Rigid boy – Centre of mass – Centre of gravity – Examples – Torque-Moment of inertia of a rigid body about an axis – Expression – radius of gyration – Moment of inertia of symmetric objects (thin rod, disc, ring, hollow and solid cylinder) – parallel and perpendicular axis theorem (no derivation)- Examples.
Fluids – streamline flow, turbulent flow – critical velocity –Surface tension – application of capillarity – Viscosity -Definition and SI units- Coefficient of Viscosity – Reynolds number

Unit II BASICS OF SOUND AND ELECTRICITY
Wave motion – audible range – infrasonic and ultrasonic – longitudinal, transverse and progressive waves – standing waves – free and forced vibration – laws of transverse vibration -Sonometer – acoustics of buildings – echo – reverberation – reverberation time – Sabine formula (no derivation) – Noise pollution – Doppler effect – applications. Current – Voltage – Ohm’s law – resistance – resistivity – effective resistance – Kirchhoff current and voltage law – Wheatstone bridge – Joule’s law of heating –applications of heating effect of electric current