Question #032b6
1 Answer
May 27, 2016
The net force is the vector sum of all the forces acting on an object.
Explanation:
Whenever a number of forces act on an object, and if the vector sum of all the forces is not balanced, then we have a resultant force. This is called net force. A net force is capable of accelerating a mass. The acceleration could be linear or circular or both.
In equilibrium state net force acting on an object is zero. The object does not accelerate.
In the figure below force
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The net force causes changes in the motion of the object described by the following expressions.
- Linear acceleration of center of mass
#vec a = vec F/ m# ;
where#vecF# is the Net Force and#m# is mass of the object - Angular acceleration of the body
#vec alpha = vec tau / I# ,
where#vectau# is the resultant torque and#I# moment of inertia of the body.
Torque, a vector quantity is caused by a net force#vec F# defined with respect to some reference point#vecr# as below
#\vec \tau = \vec r \times \vec F#
or#|\vec \tau |= k |\vec F|#
