Final answer:
In summary, a force changes or tries to change an object's motion, mass is the amount of matter which is measured in kilograms, and weight depends on mass and gravity, expressed by W=mg. A vector has magnitude and direction with force being a typical example, and the resultant force example given is a net force of 3N to the left. So, the best answer is a, A force is any action that changes or tends to change the state of rest or uniform motion of a body in a straight line.
Step-by-step explanation:
The statement "A force is any action that changes or tends to change the state of rest or uniform motion of a body in a straight line." accurately defines what a force is in physics.
This definition is in line with Newton's first law of motion, which states that a force is necessary to change the state of motion of an object.
Mass is indeed a measure of the amount of matter in an object and is constant regardless of the object's location. It is measured in kilograms.
On the other hand, weight is the gravitational force exerted on an object, which is dependent on mass and the acceleration due to gravity, as expressed by the equation W=mg.
As for a vector quantity, it is a physical quantity that has both magnitude and direction, with force being an example, typically measured in Newtons (N).
Finally, when considering the resultant of two opposing forces, such as a 2N force to the right and a 5N force to the left, the resultant force would indeed be 3N, but to the left, since force is a vector quantity and direction matters.
So, the best answer is a, A force is any action that changes or tends to change the state of rest or uniform motion of a body in a straight line.
Q: Which of the following statements about physics is accurate?
A) A force is any action that changes or tends to change the state of rest or uniform motion of a body in a straight line.
B) Mass is the amount of matter contained in an object. It is measured in kilograms.
C) A vector quantity is one that has both magnitude and direction. Force is a good example of such a quantity, and it is measured in Newtons.
D) The equation for weight is W=mg. From this equation, we can see that weight is dependent on mass and gravity.
E) An object is pulled from the right by a 2N force and from the left by a 5N force. The resultant force is 3N to the left.