physics: Add newtons_second_law_of_motion

physics/src/lib.rs

@@ -21,6 +21,7 @@ pub mod kinetic_energy;
 pub mod lorentz_transformation_four_vector;
 pub mod malus_law;
 pub mod newtons_law_of_gravitation;
+pub mod newtons_second_law_of_motion;
 pub mod potential_energy;
 pub mod rms_speed_of_molecule;
 pub mod shear_stress;

physics/src/newtons_second_law_of_motion.rs

@@ -0,0 +1,25 @@
+// Copyright (c) 2023 Xu Shaohua <shaohua@biofan.org>. All rights reserved.
+// Use of this source is governed by General Public License that can be found
+// in the LICENSE file.
+
+//! Newton's second law of motion pertains to the behavior of objects for which
+//! all existing forces are not balanced.
+//!
+//! [Newtons Second Law](https://www.physicsclassroom.com/class/newtlaws/Lesson-3/Newton-s-Second-Law)
+
+#[must_use]
+pub fn newtons_second_law_of_motion(mass: f64, acceleration: f64) -> f64 {
+    mass * acceleration
+}
+
+#[cfg(test)]
+mod tests {
+
+    use super::newtons_second_law_of_motion;
+
+    #[test]
+    fn test_newtons_second_law_of_motion() {
+        assert_eq!(newtons_second_law_of_motion(10.0, 10.0), 100.0);
+        assert_eq!(newtons_second_law_of_motion(2.0, 1.0), 2.0);
+    }
+}