Light & Wave


Kinematics of 1 D uniformly accelerated motion
Projectile motion
Vector addition of forces
Newton's first law of motion (inertia)
Motion under different kinds of force
Plane motion produced by a user-controlled force
Inclined plane
Drop an object onto a moving trolley
Work and energy
Pendulum / Interrupted Pendulum
Conical pendulum
Spring-Mass Oscillator (Kinematics and Relationship with Circular Motion)
Spring-Mass Oscillator (Energy Changes)
An oscillator
Phase Difference
Damped Oscillations
Forced oscillations (resonance)
Balancing a Vertical Pole
Sticks Falling Over
Translation and Rotation
Rotating Frame of Reference


E & M
Simple electric circuit
Shunt and multiplier
Fleming Left Hand Rule
Magnetic force
Electromagnetic induction (motional emf)
Root-mean-square Voltage
Charging a Capacitor by d.c.
Square Voltage Applied to RC
Growth of Current in Inductor
Square Voltage Applied to RL
RLC series a.c. circuit
RLC parallel resonance
Lissajous figures


Not gate
NPN common emitter amplifier


My Article in Physics Education
How tidal forces cause ocean tides in the equilibrium theory
My Articles in The Physics Teacher
Oblique and Head-On Elastic Collisions
Energy in a String Wave



Author of the applets : Chiu-king Ng, a physics educator in Hong Kong.
Copyright: The author has the copyright on all the applets appearing in this web site ( Without the author's consent, the applets cannot be used in any commercial activities.



Mechanics kinematics free fall v-t graph dynamics mechanics light optics electromagnetism electronics projectile free fall uniform acceleration force vector sum resultant force locus circular planetary inverse square law motion inclined plane momentum work and energy large-angle simple conical jumping pendulum interrupted uniform circular motion kinetic energy potential energy work done against friction SHM oscillator damped forced oscillations torque moment of inertia rotational inertia balance translation rotation slipping sliding Snell's law total internal reflection refraction prism wave motion transverse frequency wavelength amplitude crest trough compression rarefaction longitudinal standing stationary wave resonance on string superposition beat multiple sources lens effect convex concave constructive destructive interference diffraction path difference water wave ripple tank beat polarization polarizer doppler sonic boom effect electrical circuit resistor voltmeter ammeter voltage current galvanometer shunt multiplier resistance Ohm's law Magnetic force Faraday electromagnetic induction Lenz'law motional emf transformer primary secondary coil RC capacitor capacitance RL RCL RLC alternating current series resonance impedance cpacitive reactance RMS root mean square a.c. inductor inductance Lissajous figure NOT logic gate NPN transistor amplifier Java applet