INstatiate randomly objects with initial speed

Questions & Answers
1

using UnityEngine;
using System.Collections;

public class GeneratorEnemy : MonoBehaviour {
public GameObject enemy;
public int numberOfCubes =0;
public int min,max;
private float time = 0;
private int period = 5;

void Start()
{
	PlaceCubes ();
}
void Update()
{
	time += Time.deltaTime;
	if (time >= period) 
	{
		numberOfCubes ++;
		PlaceCubes();
		time = 0;
    }
}
void PlaceCubes()
{
	for (int i = 0;i <= numberOfCubes;i++)                          
	{
		Instantiate(enemy,GeneratedPosition(),Quaternion.identity);

	}
}
Vector3 GeneratedPosition()
{
			int x, y, z;
			x = UnityEngine.Random.Range (min, max);
	        y = UnityEngine.Random.Range (250, 250);
			z = UnityEngine.Random.Range (min, max);
			return new Vector3 (x, y, z);
}

}
//how can i give speed to each object?

2

Rigidbody2d rb = Instantiate(enemy,GeneratedPosition(),Quaternion.identity);
rb.velocity = Vector3.one * 100;

assuming you are using physics and have rigidbodies on the enemies