Gaby+and+German

Definition

Acceleration : a rate of increasing velocity

Formula A=F/m

Coulombs law
shows the relationship among electrical forces, charges and distance. its like Newtons law of gravity. but unlike gravity electric forces can be attractive or repulsive. It was discovere by a french scientist Charles coulomb in the 18 th century

Equation: F=KgagB ___ d2  F =force (N) K =electrical proportionality constant 9.0X 109 q = charge ( c for coulombs ) d = distance (m)





Circular Motion

Definition: Circular Motion -In physics, circular motion is rotation along a circle: a circular path or a circular orbit. It can be uniform, that is, with constant angular rate of rotation, or non-uniform, that is, with a changing rate of rotation. In physics, circular motion is rotation along a circle: a circular path or a circular orbit. It can be uniform, that is with constant angular rate of rotation, or non-uniform, that is, with a changing rate of rotation. The rotation around a fixed axis of a three-dimensional body involves circular motion of its parts. The equations describing circular motion of an object do not take size or geometry into account, rather, the motion of a point mass in a plane is assumed. In practice, the center of mass of a body can be considered to undergo circular motion.



In the diagram v is the tangential velocity of the object. a is the centripetal (acting towards the center of the circle) acceleration and F is the centripetal force. r is the radius of the circle and m is mass of the object. a = v2 / r F = ma = mv2/r

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Physics notebooks page 28-35 and physics book