Final answer:
Knowing all the forces acting on a moving object allows the calculation of its acceleration using Newton's second law (F = ma).
Step-by-step explanation:
When you know all the forces acting on a moving object, you can determine its acceleration. This is because acceleration is directly proportional to the net force acting on an object and inversely proportional to its mass, as per Newton's second law of motion (F = ma). By understanding the forces at play and applying Newton's second law, you can precisely calculate the acceleration of the object. Thus the option a is correct b. Acceleration
Understanding the forces involves considering both magnitude and direction. If there is a single force acting on the object, the acceleration can be determined straightforwardly. However, if multiple forces are involved, vector addition is necessary.
The resultant force, obtained by combining all the individual forces, is then used in the acceleration calculation. It's important to note that the direction of the acceleration will be the same as that of the resultant force.
In summary, knowledge of all the forces acting on a moving object allows you to determine its acceleration by applying Newton's second law. This provides a comprehensive understanding of the object's motion, essential in various fields such as physics and engineering.