Add Speed / Acceleration operator (#1278)

Co-authored-by: Andreas Leeb <[email protected]>
Co-authored-by: Andreas Gullberg Larsen <[email protected]>

Author: 3 people

UnitsNet.Tests/CustomCode/SpeedTests.cs

@@ -103,6 +103,13 @@ public void SpeedDividedByDurationEqualsAcceleration()
             Assert.Equal(acceleration, Acceleration.FromMetersPerSecondSquared(10));
         }
 
+        [Fact]
+        public void SpeedDividedByAccelerationEqualsDuration()
+        {
+            Duration duration = Speed.FromMetersPerSecond(20)/Acceleration.FromMetersPerSecondSquared(2);
+            Assert.Equal(Duration.FromSeconds(10), duration);
+        }
+
         [Fact]
         public void SpeedDividedByTimeSpanEqualsAcceleration()
         {

UnitsNet/CustomCode/Quantities/Speed.extra.cs

@@ -31,6 +31,12 @@ public partial struct Speed
             return Acceleration.FromMetersPerSecondSquared(speed.MetersPerSecond / duration.Seconds);
         }
 
+        /// <summary>Get <see cref="Duration"/> from <see cref="Speed"/> divided by <see cref="Acceleration"/>.</summary>
+        public static Duration operator /(Speed speed, Acceleration acceleration)
+        {
+            return Duration.FromSeconds(speed.MetersPerSecond / acceleration.MetersPerSecondSquared);
+        }
+
         /// <summary>Get <see cref="Length"/> from <see cref="Speed"/> times <see cref="Duration"/>.</summary>
         public static Length operator *(Speed speed, Duration duration)
         {