Choose the correct option for each question. There is only one correct response for each question.
Which of these is an incorrect statement about force?

Options

A. Force can change the mass of an object.
B. Force can change the shape or size of an object
C. Force can change the direction of a moving object
D. Force can slow down or speed up a moving object

Answer

To solve the question "Which of these is an incorrect statement about force?", we will analyze the options provided and determine which statement does not correctly describe the nature of force.

### Step-by-Step Solution:

1. **Understanding the Concept of Force**:
- Force is a vector quantity that can cause an object to accelerate, decelerate, or change direction. It is necessary to change the state of motion of an object.

2. **Analyzing the Options**:
- Since the specific options are not provided in the question, we will assume typical statements about force that might be presented in such a question:
- a) Force is required to move an object at rest.
- b) Force can change the direction of a moving object.
- c) Force is not required to keep an object in motion.
- d) Force can stop a moving object.

3. **Identifying the Incorrect Statement**:
- a) This statement is correct. A force is indeed required to move an object that is at rest.
- b) This statement is correct. A force can change the direction of a moving object.
- c) This statement is incorrect. According to Newton's first law of motion, an object in motion will remain in motion unless acted upon by a net external force. Therefore, a force is required to keep an object in motion if there are opposing forces (like friction).
- d) This statement is correct. A force is required to stop a moving object.

4. **Conclusion**:
- The incorrect statement about force is option c) "Force is not required to keep an object in motion."

### Final Answer:
The incorrect statement about force is option c) "Force is not required to keep an object in motion."