CHAPTER 4

1. Inertia

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

1.2. Force is needed to overcome inertia

1.2.1. when F nett =0 , inertia is present

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

2. Gravitational Field strength

2.1. Definition: Force acting on object per unit mass

2.2. Symbol : N/kg

2.3. Varies base on place

2.4. equals to acceleration

3. Mass

3.1. amount of matter in an object

3.2. independent of gravity

3.3. Si Unit: kilograms(kg)

4. Weight

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

4.1.1. Force = Mass x acceleration

4.1.1.1. Therefore, gravitational field strength = acceleration

4.2. changes due to place( gravity)

4.3. is a force