[FEAT] Add Kinematics (SUVAT) equations (#7053)

[FEAT] Add SUVAT equation for motion

Co-authored-by: Priyanshu1303d <priyanshu130d@gmail.com>

src/test/java/com/thealgorithms/physics/KinematicsTest.java

@@ -0,0 +1,48 @@
+package com.thealgorithms.physics;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Unit tests for the Kinematics utility class.
+ */
+
+public final class KinematicsTest {
+    // A small tolerance for comparing floating-point numbers
+    private static final double DELTA = 1e-9;
+    @Test
+    @DisplayName("Test final velocity: v = u + at")
+    void testCalculateFinalVelocity() {
+        assertEquals(20.0, Kinematics.calculateFinalVelocity(10.0, 2.0, 5.0), DELTA);
+    }
+
+    @Test
+    @DisplayName("Test displacement: s = ut + 0.5at^2")
+    void testCalculateDisplacement() {
+        assertEquals(75.0, Kinematics.calculateDisplacement(10.0, 2.0, 5.0), DELTA);
+    }
+
+    @Test
+    @DisplayName("Test final velocity squared: v^2 = u^2 + 2as")
+    void testCalculateFinalVelocitySquared() {
+        assertEquals(400.0, Kinematics.calculateFinalVelocitySquared(10.0, 2.0, 75.0), DELTA);
+    }
+
+    @Test
+    @DisplayName("Test displacement from average velocity: s = (u+v)/2 * t")
+    void testCalculateDisplacementFromVelocities() {
+        assertEquals(75.0, Kinematics.calculateDisplacementFromVelocities(10.0, 20.0, 5.0), DELTA);
+    }
+
+    @Test
+    @DisplayName("Test with negative acceleration (deceleration)")
+    void testDeceleration() {
+        assertEquals(10.0, Kinematics.calculateFinalVelocity(30.0, -4.0, 5.0), DELTA);
+        assertEquals(100.0, Kinematics.calculateDisplacement(30.0, -4.0, 5.0), DELTA);
+
+        assertEquals(100.0, Kinematics.calculateFinalVelocitySquared(30.0, -4.0, 100.0), DELTA);
+        assertEquals(100.0, Kinematics.calculateDisplacementFromVelocities(30.0, 10.0, 5.0), DELTA);
+    }
+}