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Variation of frictional force with applied force
Imagine the following situation. A heavy crate is resting on the floor in a warehouse. You push it horizontally with a steady force, but it does not move. That is because the force that you apply is balanced by a frictional force exerted horizontally on the bottom of the crate by the floo..
Imagine the following situation. A heavy crate is resting on the floor in a warehouse. You push it horizontally with a steady force, but it does not move. That is because the force that you apply is balanced by a frictional force exerted horizontally on the bottom of the crate by the floo..It is easier to open the door by applying force near the outer edge away from the hinges.
When we apply the force the door turns on its hinges. Thus a turning effect is produced when we try to open the door. Have you ever tried to do so by applying the force near the hinge? In the first case, we are able to open the door with ease. In the second case, we have to ..
Illustration
Let us take the case of a heavy door. If a force is applied at a point, which is close to the hinges of the door, we may find it quite difficult to open or close the door. However, if the same force is applied at a point, which is at the maximum distance from hinges, we can easi..
Newton's Second Law of Motion
The rate of change of momentum of a body is proportional to the applied force and takes place in the direction in which the force is applied..
Electronic Brakes
Eddy currents can brake the motion of the train too. A metal drum is attached to the train. To apply brakes a strong magnetic field is applied across the drum. The eddy currents set up in the drum in a direction as to oppose the change in the magnetic flux that is, it opposes t..
Moments (or Torque)
It is easier to open the door by applying force near the outer edge away from the hinge..
Bernoulli's Theorem
This theorem is a consequence of the principle of conservation of energy, applied to ideal liquids in motio..
Introduction - Physical world and Measurement
Introduction - Physical world and Measurement - Physics is sometimes called as 'science of measurement'. The acceleration produced by a force for the motion of a body can be known by measuring the magnitude of applied force and mass of the body. Similarly, the distance..
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