Question 19 (1 point) A moving toy car increases it's velocity by two after a collision. If this happens the momentum of thecar will be . a zero b half as large twice as much d the same Question 20 (1 point) Select all of the following that are true of elastic collisions. The objects separate b Momentum is conserved c Kinetic Energy is conserved d The objects stick

## Step1<br />For question 19, we need to understand the concept of momentum in physics. Momentum is the product of an object's mass and its velocity. If the velocity of the toy car increases by two after a collision, it means that the speed of the car has increased. Since the mass of the car remains constant, the momentum of the car will also increase. Therefore, the momentum of the car will be twice as much as before the collision.<br /><br />## Step2<br />For question 20, we need to understand the properties of elastic collisions. In an elastic collision, both momentum and kinetic energy are conserved. This means that the total momentum and kinetic energy before the collision are equal to the total momentum and kinetic energy after the collision. The objects do not stick together in an elastic collision, they separate. Therefore, the statements "The objects separate", "Momentum is conserved", and "Kinetic Energy is conserved" are true for elastic collisions.