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Force, Linear or translation motion
Force acting on a rigid body,Which is…
Force
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Center of gravity
center of gravity of a body is the algebraic sum of moments of weights of all the particles constituting the body is zero. the entire weight of the body can be considered to act at this point, howsoever the body is placed
1. The position of the center of gravity of a body depends on its shape or the distribution of mass
2. It is not necessary that the center of gravity always be within the material of the body
Uniform Circular Motion
Uniform circular motion
when a particle moves with a constant speed in a circular path, its motion is said to be uniform circular motion
Centripetal Force
Centripetal force is the force acting on a body moving in a circular path, in a direction towards the centre of the circular path
Centrifugal force
A force assumed to be acting on the body in a direction away from the centre of circular path, is called centrifugal force
Linear or translation motion
Force acting on a rigid body,Which is free to move and the body moves in a straigth line path in the direction of applied force is called linear motion
Rotational motion
When the body is pivoted at a point and force is applied it rotates the body about the axis passing though the pivoted point
Principle of Moments
According to principle of moments,in equilibrium
Sum of the anticlockwise moments=sum of the clockwise moments
At any point the direction of motion is along the tanget drawn at that point of the circular path
Velocity of the particle is variable or circular motion is an accelerated motion even though the speed of the particle is uniform