Ayisha

What is Pseudo force? Asked Rahul Answer: The word pseudo means false. (Also called fictitious force,or phantom force) An additional force due to nonuniform relative motion of two reference frames is called a pseudo-force. A pseudoforce does not arise from any physical interaction between two objects, but rather from the acceleration a of the non-inertial reference frame itself. A fictitious force on an object arises when the frame of reference used to describe the object’s motion is accelerating compared to a non-accelerating frame. Consider a ball hung from the roof of a train by means of an inextensible string. If the train is at rest or is moving with a uniform speed in a straight line the string will be vertical. A passenger will infer that the net force acting on the ball is zero. If the train begins to accelerate, then the string will be making an angle with respect to the vertical. For the passenger, there are only two forces and they are not collinear. But, the ball remains apparently in a state of equilibrium (as long as the acceleration of the train is constant). Here, the concept of pseudoforce is required.