Question

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

Explanation:

1. Analyze each option:

• The first option: Gravitational force is just one type of force, not the sum of all forces, so this is incorrect.
• The second option: Acceleration is related to force by \( F = ma \), but acceleration is not the sum of forces. So this is incorrect.
• The third option: Net force is the sum of all forces, but force is a vector quantity, so the sum should be a vector sum (not scalar). So this is incorrect.
• The fourth option: Net force is defined as the vector sum of all forces acting on an object. This matches the definition.

Answer:

D. net force, which is a vector sum (assuming the options are labeled A, B, C, D in order. If the original options have different labels, adjust accordingly. Based on the given options, the correct one is "net force, which is a vector sum")