diff --git a/lab6-3.h b/lab6-3.h
new file mode 100644
index 0000000000000000000000000000000000000000..581b9dc6dee79f9c3c60f52e9cc30445a388fc1c
--- /dev/null
+++ b/lab6-3.h
@@ -0,0 +1,13 @@
+bool czyPoprawne(int m, int r){
+    if (m<=0 || r<=0)
+        return false;
+    else
+        return true;
+}
+
+float predkosc(int m, int r){
+    const float g = 6.674 * pow(10, -11);
+    float v;
+    v = sqrt((2*m*10e24*g)/r*10e6);
+    return v;
+}