Acceleration due to gravity is the acceleration experienced by an object due to the gravitational force of a massive object, like the Earth. It's denoted by the symbol g.
* Value: On Earth, the standard value of g is approximately 9.81 m/s² (meters per second squared). This means that an object falling freely near the Earth's surface will increase its speed by 9.81 meters per second every second.
* Factors affecting g: The value of g is not constant across the Earth due to factors like:
* Altitude: g decreases with increasing altitude.
* Latitude: g is slightly higher at the poles and lower at the equator.
* Earth's density: Variations in the Earth's density also influence g.
Key points:
* Direction: Acceleration due to gravity is always directed towards the center of the Earth.
* Free fall: An object falling freely under the influence of gravity experiences only the acceleration due to gravity.
* Neglecting air resistance: The value of g is often used in calculations assuming no air resistance.
Uniform accelerated motion is a type of motion where the acceleration is constant in both magnitude and direction. This means that the velocity of the object changes at a steady rate.
* Constant acceleration: The object's velocity changes by the same amount in every equal time interval.
* Examples:
* A car accelerating from rest at a constant rate.
* A ball thrown vertically upward experiencing constant downward acceleration due to gravity.
Key points:
* Equations of motion: Specific equations are used to describe the motion of objects undergoing uniform accelerated motion.
* Linear motion: Uniform accelerated motion can be linear (straight-line motion) or curvilinear (motion along a curved path).
Acceleration due to gravity is a specific example of uniform accelerated motion. When an object falls freely under the influence of Earth's gravity, it experiences constant acceleration (g) in the downward direction, making it an example of uniform accelerated motion.
In summary, acceleration due to gravity is a specific instance of uniform accelerated motion caused by the gravitational pull of a massive object, while uniform accelerated motion is a broader concept encompassing any motion with constant acceleration.
