fnmain(){// Sinusiodal Oscilator moves at 5 Hz across 50 mm
let f =measurements::Frequency::from_hertz(5.0);let d =measurements::Distance::from_millimeters(50.0);// Speed = PI * Frequency * Displacement
// Speed = PI * Displacement / Period
let v =std::f64::consts::PI* d / f.as_period();println!("Maximum speed of a pendulum at {:.1} with max displacement {:.1} is {:.1}",
f, d, v
);}