The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane equal to the angle of friction.
The force required to move the body up the plane will be minimum if it makes an angle with the inclined plane equal to the angle of friction.
A ladder is resting on a smooth ground and leaning against a rough vertical wall. The force of friction will act upward at its upper end.
A ladder is resting on a rough ground and leaning against a smooth vertical wall. The force of friction will act zero at its upper end.
In a screw jack, the effort required to lower the load is less than the effort required to raise the same load.
An ideal machine is that in which there is no dissipation of energy in any manner. In an ideal machine, the work output is equal to the work input, i.e., efficiency of an ideal machine is 100%.
In ideal machines mechanical advantage is equal to velocity ratio.