Forces and Motion
Forces and Motion is a principle of physics which examines the way in which objects move and interact. A force is a push or pull that might make an object change its movement and acceleration. Studying these concepts allows us to understand everyday phenomena, from riding a bicycle to the orbits of planets.
Newton's Laws of Motion 🚗
First Law (Law of Inertia): Any object at rest stays at rest and any object in motion continues moving at a constant velocity unless acted upon by an unbalanced force. This explains why seatbelts are essential in cars.
Second Law: An object's acceleration depends on the net force acting on it and its mass, following the relation F = m × a.
Push a Box (Newton’s 2nd Law)
Third Law: For every action, there is an equal and opposite reaction. When you apply force to an object, it pushes back with equal force in the opposite direction.
Rocket Launch (Newton’s 3rd Law)
Gravity 🌍
Gravity is the force that draws two bodies together. It gives weight to physical objects and makes them fall when dropped. The strength of gravity depends on an object's mass and the distance between objects.
Falling Ball (Gravity)
Friction ⚙️
Friction is the resistance encountered by an object moving across another surface. It slows objects down and is the reason things come to a stop when no additional force is applied. The amount of friction depends on the surfaces involved.
Inertia 🧱
Inertia is the property of an object that resists any change in its motion. Heavier objects have greater inertia, making them harder to start or stop. This concept is directly linked with Newton's First Law.
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