# 4.2 - Energy changes during SHM 4.3 - Forced Oscilliations and Resonance

Mind Map by , created over 5 years ago

## Physics HL (4 - Simple Harmonic Motion and Waves) Mind Map on 4.2 - Energy changes during SHM 4.3 - Forced Oscilliations and Resonance, created by wondersnail on 03/22/2014.

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 Created by wondersnail over 5 years ago
4.5 - Wave Properties
6.1 Gravitational Forces and Fields
6.2 - Gravitational Potential
Hitlers Germany
IMMUNITY
4.4 - Wave Characteristics
4.6 - Standing waves
4.1 - Kinematics of SHM
4.10 - Polarisation
4.7 - The Doppler Effect
4.2 - Energy changes during SHM 4.3 - Forced Oscilliations and Resonance
1 4.2.1
1.1 Considering a swinging pendulum: at the maximum placement from O the pendulum has maximum potential enery and minimum kinetic energy. when the pendulum is at the equilibrium position, O, is has minimum potential energy and maximum kinetic energy
2 4.3.1
2.1 Damping- When a system has to do work against opposing forces such as air resistance and friction it will lose energy and thus oscilliate less.
2.2 For example cars have dampers between the body and the wheels. Their purpose is to damp the oscilation caused by bumps in the road
3 4.3.3
3.1 Natural frequency, f0 - the frequency by which a system would oscillate if not disturbed; when a pendulum is lift and released
3.2 Forced oscillation- when a system is forced to oscillate in a frequency other than its natural frequency
4 4.3.5
4.1 Resonance- Forcing a system to vibrate at its antural frequency will increase its aplitude