![]() What force is required to make the particle move when pulling at an angle 45° to the horizontal. The coefficient of friction between the particle and the ground is. A particle of mass 2 Kg rests on a rough horizontal ground. When the equilibrium is limiting, the angle between the Normal contact force R and the total contact force S as shown in Fig 2 is known as the angle of friction: For General Equilibrium it may have value from 0 up to. (known as mew) is called the coefficient of friction and thus maximum value of the frictional contact force is defined as: Through several experiments conducted, it is found that the frictional contact force bears a constant ratio to the normal contact force and this constant depends upon the roughness of the two surfaces in contact. Now the frictional contact force opposing this motion is maximum. We keep adding weights to the pan until the stage where the block is about to move. Where m is the rest mass, and v is the velocity with respect to. This shows that Frictional Force is equal to the weights in the pan P. We calculate that the relativistic form of the energy of a particle is E mc2 / sqrt(1-v2/c2). ![]() When we put different weights in the pan, the block does not move. It is connected to a light pan P with a light inextensible string as shown in Fig 1. Let’s suppose a block is lying on a rough table. Let’s move on to study what the coefficient of friction is. The ratio depends upon the nature of the surface and. The magnitude of the limiting friction bears a constant ratio, to the normal contact force R.
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