CHAPTER 4

1. Mass

1.1. amount of matter in an object

1.2. independent of gravity

1.3. Si Unit: kilograms(kg)

2. Weight

2.1. Weight(N)= Mass(kg)x gravitational field strength(N/kg)

2.1.1. Force = Mass x acceleration

2.1.1.1. Therefore, gravitational field strength = acceleration

2.2. changes due to place( gravity)

2.3. is a force

3. Inertia

3.1. reluctance of object to change its state of rest/movement

3.2. Force is needed to overcome inertia

3.2.1. when F nett =0 , inertia is present

3.3. greater mass=greater inertia=more force needed to overcome inertia

4. Gravitational Field strength

4.1. Definition: Force acting on object per unit mass

4.2. Symbol : N/kg

4.3. Varies base on place

4.4. equals to acceleration