**Question 1:**

### Newton's second law of motion relates force, acceleration, and:

Explanation: The correct answer is B) Mass. Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. The relationship is expressed by the equation F = ma, where F represents force, m represents mass, and a represents acceleration.

**Question 2:**

### According to Newton's second law of motion, if the net force acting on an object is doubled, its acceleration will:

Explanation: The correct answer is C) Double. According to Newton's second law of motion, if the net force acting on an object is doubled, its acceleration will also double. This is because acceleration is directly proportional to the net force acting on an object.

**Question 3:**

### Which equation represents Newton's second law of motion?

Explanation: The correct answer is C) F = ma. Newton's second law of motion is mathematically expressed by the equation F = ma, where F represents force, m represents mass, and a represents acceleration. This equation states that the force acting on an object is equal to the product of its mass and acceleration.

**Question 4:**

### Which of the following statements correctly explains the relationship between force and acceleration according to Newton's second law of motion?

Explanation: The correct answer is A) Force is directly proportional to acceleration. According to Newton's second law of motion, force and acceleration are directly proportional to each other. If the force acting on an object increases, its acceleration will also increase, assuming the mass remains constant.

**Question 5:**

### What is the SI unit of force?

Explanation: The correct answer is B) Newton (N). The SI unit of force is the Newton (N), named after Sir Isaac Newton. One Newton is defined as the force required to accelerate a one-kilogram mass by one meter per second squared (1 N = 1 kg × m/s²).

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