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In mechanics, acceleration is the rate of change of the velocity of an object with respect to time. Acceleration is one of several components of kinematics, the study of motion. Accelerations are vector quantities (in that they have magnitude and direction).
acceleration due to gravity The acceleration on an object caused by the force of gravitation. accelerometer An instrument used to measure the proper acceleration of a body irrespective of other forces. acoustics The branch of physics dealing with the production, transmission, and effects of sound. adhesion adhesion is what makes things stick ...
Acceleration: a →: Rate of change of velocity per unit time: the second time derivative of position m/s 2: L T −2: vector Angular acceleration: ω a: Change in angular velocity per unit time rad/s 2: T −2: pseudovector Angular momentum: L: Measure of the extent and direction an object rotates about a reference point kg⋅m 2 /s L 2 M T ...
The gravitational acceleration vector depends only on how massive the field source is and on the distance 'r' to the sample mass . It does not depend on the magnitude of the small sample mass. This model represents the "far-field" gravitational acceleration associated with a massive body.
A simple free-body diagram, shown above, of a block on a ramp, illustrates this. All external supports and structures have been replaced by the forces they generate. These include: mg: the product of the mass of the block and the constant of gravitation acceleration: its weight. N: the normal force of the ramp. F f: the friction force of the ramp.
As the acceleration is the second derivative of position with respect to time, this can also be written =. A free body diagram for a block on an inclined plane, illustrating the normal force perpendicular to the plane ( N ), the downward force of gravity ( mg ), and a force f along the direction of the plane that could be applied, for example ...
In classical mechanics, a gravitational field is a physical quantity. [5] A gravitational field can be defined using Newton's law of universal gravitation.Determined in this way, the gravitational field g around a single particle of mass M is a vector field consisting at every point of a vector pointing directly towards the particle.
The SI unit for acceleration is metre per second squared (m s −2). Accelerations are vector quantities (they have magnitude and direction) and add according to the parallelogram law. [6] [7] As a vector, the calculated net force is equal to the product of the object's mass (a scalar quantity) and its acceleration.