Chapter 4
Door ISABEL CHUA JIA JUN .
1. Inertia
1.1. Reluctance of an object to change its state of rest or motion due to its mass
1.2. Greater mass = Greater inertia = Harder to start moving, slow down, move faster, or change direction
2. Gravitational Field Strength
2.1. Gravitational Field: A region where mass experiences a force due to gravitational attraction
2.2. Gravitational force acting per unit mass
2.3. Weaker gravitational field strength = Weighs less
3. Density
3.1. Mass divided by volume
3.2. How much mass is packed into a given space; mass per unit volume
3.3. SI Unit: kilogram per cubit metre
3.4. Higher density = Sink, Lower density = Float
4. Mass
4.1. Amount of matter in a body
4.1.1. Number and composition of atoms and molecules
4.2. Does not change with its location or shape
4.3. Scalar
4.4. SI Unit: kilogram/kg
4.5. Measured by beam balance
4.5.1. Beam Balance
5. Weight
5.1. Amount of gravitational force acting on a body
5.2. It is a force, therefore is a vector (acting downwards)
5.3. Dependent on gravitational field strength
5.4. SI Unit: newton/N
5.5. Measured by
5.5.1. Electronic Balance
5.5.2. Spring Balance