**Question 1:**

### What is recoil?

Explanation: The correct answer is C) The backward movement of an object after ejecting a mass. Recoil refers to the backward movement of an object when it ejects or expels a mass. This occurs due to the conservation of momentum, where the momentum of the ejected mass in one direction is balanced by the recoil momentum of the object in the opposite direction.

**Question 2:**

### According to the law of conservation of momentum, which statement is true regarding recoil?

Explanation: The correct answer is B) The recoil momentum is equal to the momentum of the ejected mass. According to the law of conservation of momentum, the total momentum of an isolated system remains constant. In recoil, the momentum of the ejected mass in one direction is equal to the recoil momentum of the object in the opposite direction, satisfying the conservation of momentum.

**Question 3:**

### What happens to the recoil of an object if the mass of the ejected mass increases?

Explanation: The correct answer is A) The recoil increases. According to the conservation of momentum, if the mass of the ejected mass increases, the recoil momentum of the object must increase to balance it. Therefore, the recoil of the object increases as the mass of the ejected mass increases.

**Question 4:**

### What happens to the recoil of an object if the speed of the ejected mass increases?

Explanation: The correct answer is C) The recoil remains the same. The speed of the ejected mass does not directly affect the recoil of the object. The recoil is solely dependent on the mass and momentum of the ejected mass. As long as the mass and momentum of the ejected mass remain constant, the recoil of the object will remain the same.

**Question 5:**

### Which of the following statements is true regarding the conservation of momentum in recoil?

Explanation: The correct answer is C) The total momentum of the system remains the same in recoil. According to the law of conservation of momentum, the total momentum of an isolated system remains constant. In recoil, the momentum of the ejected mass in one direction is balanced by the recoil momentum ofthe object in the opposite direction, resulting in the total momentum of the system remaining constant.

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