A class I lever acts as a force multiplier.
A class I lever acts as a force multiplier.
The correct option is A True
The ratio of effort arm to load arm is termed as the mechanical advantage (MA) of a machine.
The velocity ratio of a machine is defined as the ratio of the velocity of the effort to the velocity of the load.
For an ideal system, mechanical advantage = velocity ratio = 1
For class I lever, the load acts in the middle, fulcrum at one end, and effort at the other end.
So, effort arm > load arm, MA, and VR are always greater than one, hence acting as a force multiplier.
For the class III lever, effort acts in the middle and the load and fulcrum are at the endpoints.
So, effort arm < load arm, MA, and VR are always less than one.
Since the velocity ratio is one, so the velocity of effort is less than the velocity of the load. Hence it acts as a speed multiplier.
A machine cannot act as a force multiplier and a speed multiplier simultaneously because for the speed multiplier, the MA of the machine should be less than 1 and for the force multiplier, MA should be greater than 1.
The ratio of effort arm to load arm is termed as the mechanical advantage (MA) of a machine.
The velocity ratio of a machine is defined as the ratio of the velocity of the effort to the velocity of the load.
For an ideal system, mechanical advantage = velocity ratio = 1
For class I lever, the load acts in the middle, fulcrum at one end, and effort at the other end.
So, effort arm > load arm, MA, and VR are always greater than one, hence acting as a force multiplier.
For the class III lever, effort acts in the middle and the load and fulcrum are at the endpoints.
So, effort arm < load arm, MA, and VR are always less than one.
Since the velocity ratio is one, so the velocity of effort is less than the velocity of the load. Hence it acts as a speed multiplier.
A machine cannot act as a force multiplier and a speed multiplier simultaneously because for the speed multiplier, the MA of the machine should be less than 1 and for the force multiplier, MA should be greater than 1.
