Question

how does a bathroom scale measure weight? it shows us how much we would weight on all planets. it just gives us our mass. it measures the force between the earth’s mass and our mass to give us our weight here on earth. it measures the gravity between us, the earth, and the moon. rewatch

Explanation:

• Option 1: Bathroom scales don't show weight on all planets, as they are calibrated for Earth's gravity. Eliminate.
• Option 2: Scales measure weight (force due to gravity), not just mass. Mass is constant, weight varies with gravity. Eliminate.
• Option 3: Weight is the gravitational force between Earth and an object. A bathroom scale measures the normal force (equal to weight on Earth's surface) from the Earth - object interaction. Correct.
• Option 4: Bathroom scales are for Earth's gravity, not involving the moon's gravity in their measurement. Eliminate.

Answer:

C. It measures the force between the Earth’s mass and our mass to give us our weight here on Earth.