diff --git a/physics/horizontal_projectile_motion.py b/physics/horizontal_projectile_motion.py
index ea90b5603..96afc92b2 100644
--- a/physics/horizontal_projectile_motion.py
+++ b/physics/horizontal_projectile_motion.py
@@ -120,6 +120,6 @@ if __name__ == "__main__":
         v_dis = str(max_height(init_vel, angle))
         t_time = str(total_time(init_vel, angle))
         print("Results: ")
-        print("Horizontal Distance: " + h_dis + " [m]")
-        print("Maximum Height: " + v_dis + " [m]")
-        print("Total Time: " + t_time + " [s]")
+        print(f"Horizontal Distance: {h_dis} [m]")
+        print(f"Maximum Height: {v_dis} [m]")
+        print(f"Total Time: {t_time} [s]")