Question

Which of the following is an incorrect statement? A. Unbalanced force produces constant velocity. B. Newton’s third law talks about the direction of the force. C. Newton’s first law of motion is the law of inertia. D. Mass is the measure of inertia of a body.

Answer 1

The incorrect statement is A: 'Unbalanced force produces constant velocity'. Unbalanced force causes an object to accelerate, not move with a constant velocity. The other three statements about Newton's laws and mass are true.

Step-by-step explanation:

Among the four statements, statement A: 'Unbalanced force produces constant velocity' is incorrect. According to Newton's Second Law of motion, an unbalanced force on an object causes it to accelerate, not move with a constant velocity. Statement B, C, and D are all correct. Newton’s third law does talk about the direction of the force stating that for every action, there is an equal and opposite reaction. Statement C is also correct as Newton’s first law of motion is indeed the law of inertia, stating an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force. Mass being the measure of inertia of a body (Statement D) is also correct because the more mass a body has, the more it resists changes in its state of motion.

Learn more about Newton's Laws of Motion