Which of the following is not a correct statement?

Options

A. A force can change the state of rest or motion of a body
B. A force can change the direction of a body
C. A force can change the chemical properties of a body
D. A force can change the dimensions of a body.

Explanation

To determine which statement is not correct, let's analyze each option one by one.

### Step 1: Analyze Option A
**Statement:** A force can change the state of motion, state of rest, or motion of a body.
**Explanation:** This statement is correct. According to Newton's laws of motion, a force can indeed change an object's state of rest or motion. If a body is at rest, applying a force can set it in motion, and if it is already in motion, a force can change its velocity or direction.

### Step 2: Analyze Option B
**Statement:** A force can change the direction of a body.
**Explanation:** This statement is also correct. When a force is applied to an object, it can change the direction in which the object is moving. For example, when you push a ball to the side, you change its direction.

### Step 3: Analyze Option C
**Statement:** A force can change the chemical properties of a body.
**Explanation:** This statement is not correct. While forces can change the physical state or shape of an object (like compressing a spring or bending a metal), they do not change the chemical properties of a substance. Chemical properties are altered through chemical reactions, not through the application of force.

### Step 4: Conclusion
Based on the analysis, the statement that is not correct is **Option C**: A force can change the chemical properties of a body.

### Final Answer
**The answer is Option C.**

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