GCSE Science/Force
Force is a push or pull that can change the motion of an object
- Force is an external influence that alters a body's state of rest or its uniform straight-line motion.
- Motion-Motion refers to the change in an object's position relative to a chosen reference point or frame of reference. It is a core concept that describes how objects move through space over time.
Inertia and Mass
[edit | edit source]Inertia-The property of matter that causes it to resist changes to its state of rest or uniform straight-line motion is known as inertia. Inertia can be categorized into three types:
- Inertia of Rest
- Inertia of Motion
- Inertia of Direction
Mass-Mass is a measure of the quantity of matter in an object or substance. It is a key property that indicates how much an object resists changes in its motion and how it interacts with gravitational forces. Mass is calculated in grams (g) or kilograms (kg).
- Mass is a quantitative measure of Inertia ,more the mass ,more will be the inertia and vice-versa.
Newton’s First Laws of Motion
[edit | edit source]- An object will remain at pause or continue to move in a straight line path at a constant speed unless external force act upon him.
- Every object has a natural tendency to resist changes to its state of rest or motion, and this resistance is known as inertia.
The second law of motion: The rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force
Momentum: The momentum of an object is the product of its mass and velocity and has the same direction as that of the velocity. Its S.I. unit is kg m/s.
Third law of motion: To every action, there is an equal and opposite reaction and they act on two different bodies.