When the speed of an object is doubled,its momentum decreases quadruples remains unchanged in accord with the conservation of momentum. doubles

## Step 1<br />The problem is about the concept of momentum in physics. Momentum is a vector quantity, which means it has both magnitude and direction. It is defined as the product of an object's mass and its velocity.<br /><br />### **Momentum = mass \times velocity**<br /><br />## Step 2<br />According to the formula, if either the mass or the velocity of an object increases, the momentum of the object will also increase. This is because the momentum is directly proportional to both the mass and the velocity of the object.<br /><br />## Step 3<br />In this problem, the speed of the object is doubled, which means the velocity of the object is doubled. According to the formula, if the velocity is doubled, the momentum will also double, assuming the mass remains constant.