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CHAPTER 4- MASS WEIGHT AND DENSITY
K.
KOH JING EN JOLENE .
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CHAPTER 4- MASS WEIGHT AND DENSITY
Door
KOH JING EN JOLENE .
1. Object with greater mass more prone to greater inertia (more hard to change/move about etc)
2. It is the amount of matter in a body.
3. The inertia of an object refers to the reluctance of the object to change its state of rest or motion, due to its mass.
4. Constant everywhere (does not depend on location)
5. Mass
5.1. SI unti- Kilogram (KG)
5.2. Measured using a beam balance
5.3. Related by equation- W= mg
5.4. It is a scalar quantity
6. Weight
6.1. SI unit- Newton (N)
6.2. measured using a compression balance, spring balance or a bathroom scale
6.3. It is a vector quantity.
6.4. varies since it depends on the force of gravity
7. Inertia
7.1. Examples: An elephant will find it hard to run in a zig-zag manner as it has a large mass, and thus has a greater inertia
7.2. This is the reason why we have to wear seat belts when in a car.
8. Gravitational field strength
8.1. Gravitational field strength is defined as the gravitational force acting per unit mass of an object
8.2. Gravitational field strength apprx 10N/Kg
8.3. Weight/ Mass
8.4. acceleration due to gravity (m/s^2)
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