Final Answer:
B) Net velocity is a vector quantity that represents the overall motion of an object, while net force is a vector quantity that represents the overall effect of all forces on an object.
Step-by-step explanation:
B) Net velocity is a vector quantity that represents the overall motion of an object, while net force is a vector quantity that represents the overall effect of all forces on an object.
Net velocity encompasses both magnitude and direction, combining the X-velocity and Y-velocity vectors. It's a resultant vector that indicates the overall motion of an object in a specific direction. For instance, if an object moves 5 m/s eastward (X-velocity) and 3 m/s northward (Y-velocity), the net velocity is found by vector addition to be 6.4 m/s at a direction of approximately 56.3° north of east (calculated using trigonometry).
On the other hand, net force, also a vector quantity, accounts for the overall effect of all forces acting on an object. By summing all individual force vectors (considering both magnitude and direction), the net force on an object is determined. According to Newton's second law (F = ma), if multiple forces act on an object in different directions, the resultant net force affects the object's acceleration, modifying its velocity. For example, if a 10 N force pushes an object eastward and a 5 N force acts northward, the resultant force (using vector addition) would be √125 N at an angle of approximately 26.6° north of east.
In summary, while net velocity involves combining X and Y velocities to determine an object's overall motion, net force integrates all forces acting on an object to define its resultant force affecting acceleration in a particular direction. Both concepts, represented as vectors, are fundamental in comprehending an object's motion and the forces influencing it in a given system.