Forces and Motion

Big Ideas: More info...

Objects interact with each other (by contact or at a distance) - giving rise to pairs of forces.
A force acting on an object causes its velocity to change; without a net force, its velocity is constant.

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Hacksaw blade resonator

Class experiment: Something like a blade can oscillate on its own at a definite frequency. Here students investigate what...

Practical Activity 14-16

Class experiment: In this experiment the amplitude of forced vibrations is measured as the driving frequency varies. It could...

Practical Activity 14-16

Resonance has wide ranging practical applications. Any machine or structure is likely to be subjected to periodic forces...

Teaching Guidance 14-16

Simple harmonic oscillators show resonance if they are forced to vibrate at their natural frequency. This is a phenomenon of...

Lesson 16-19