Question

forces that change motion quick check
which of the following best describes the sum of all forces acting on an object? (1 point)
net force, which is a scalar sum
net force, which is a vector sum
gravitational force, which is a vector sum
acceleration, which is a vector sum

Explanation:

Forces are vectors as they have both magnitude and direction. The sum of all forces acting on an object is called the net force. Since forces are vectors, their sum is a vector sum (using vector addition rules like the parallelogram law or component - wise addition). Gravitational force is just one type of force. Acceleration is related to force by \(F = ma\) (Newton's second law), but acceleration is not the sum of forces.

Answer:

net force, which is a vector sum