Question

what is the main difference between weight and mass?
oa. weight is measured in grams, and mass is measured in pounds.
ob. weight is dependent on gravity, and mass is not.
oc. weight can be measured, and mass cannot.
od. there is no difference between weight and mass.

Explanation:

Mass is the amount of matter in an object. Weight is the force exerted on an object due to gravity. Since weight is a force ($F = mg$, where $m$ is mass and $g$ is acceleration due to gravity), it depends on the value of $g$ (which varies depending on the location, e.g., on Earth vs. on the Moon). Mass, on the other hand, is an intrinsic property of the object and does not change with location.

• Option A: Incorrect. Grams are a unit of mass, and pounds can be a unit of force (related to weight).
• Option B: Correct. As per the definitions of weight and mass.
• Option C: Incorrect. Both mass (e.g., using a balance - scale) and weight (e.g., using a spring - scale) can be measured.
• Option D: Incorrect. There is a clear difference as explained.

Answer:

B. Weight is dependent on gravity, and mass is not.