* Acceleration due to gravity (g): This is the constant acceleration experienced by objects near the Earth's surface due to the force of gravity. It's approximately 9.8 m/s².

* Apparent weight: This is the force that a scale reads when you stand on it. It's not the same as your true weight (which is the force of gravity acting on you).

How Apparent Weight is Affected:

Apparent weight can be different from your true weight in situations where you're accelerating or experiencing forces other than gravity. Here are a few examples:

* Elevator accelerating upwards: When an elevator accelerates upwards, you feel heavier. This is because the normal force from the floor is greater than your true weight to provide the necessary upward acceleration.

* Elevator accelerating downwards: When an elevator accelerates downwards, you feel lighter. This is because the normal force from the floor is less than your true weight.

* Freefall: In freefall, you experience weightlessness. This is because the normal force from the floor is zero.

Calculating Apparent Weight:

Apparent weight (W') can be calculated using the following equation:

W' = mg + ma

Where:

* W' is the apparent weight

* m is your mass

* g is the acceleration due to gravity

* a is your acceleration

Example:

Let's say you're in an elevator accelerating upwards at 2 m/s². Your mass is 70 kg. Your apparent weight would be:

W' = (70 kg)(9.8 m/s²) + (70 kg)(2 m/s²)

W' = 836 N

This means you would feel heavier than your normal weight.

In Summary:

Acceleration due to gravity is a constant, but apparent weight can change depending on your acceleration. This is because apparent weight is the force that a scale reads, which depends on the net forces acting on you.