Mass and Weight

• Define weight accurately as the specific force acting on an object entirely due to gravity.

• Describe the standardized methods for measuring weight using a calibrated spring balance or newtonmeter.

• Describe the mathematical relationship between the weight of a body, its mass, and the local gravitational field strength.

• Understand that the force of gravity close to the Earth is caused by the Earth's surrounding gravitational field.

• Explain that the weight of an object fundamentally depends on the exact gravitational field strength at its location.

• Recall and correctly apply the equation:

$W = m g$

• Identify the correct units for weight in newtons, mass in kilograms, and gravitational field strength in newtons per kilogram.

• Recognize and apply the principle that the weight of an object is directly proportional to its mass.

• Use the mathematical symbol for proportionality correctly within physics contexts.