Mass, Weight, Inertia, and Gravitational Field Strength

1. Mass

1.1. The amount of matter in an object

1.2. Scalar quantity

1.3. SI Unit: Kilogram (kg)

1.4. Measured by

1.4.1. Beam Balance

1.4.2. Calibrated Electronic balance

1.5. Independent of gravitational field strength

2. Weight

2.1. The amount of gravitational force acting on an object

2.2. SI Unit: Newton (N)

2.3. Measured by :

2.3.1. Spring balance

2.3.2. Beam Balance

3. Inertia

3.1. The reluctance of the object to change the state of rest or motion due to its mass

3.2. All object have inertia

3.3. A force is needed to overcome inertia

4. Gravitational Field Strength

4.1. the region which a mass experiences a force due to gravitational attraction

4.2. gravitational force acting per unit mass

4.3. N/Kg