What is an example of a force multiplier?
Some examples of force multipliers are inclined planes and most levers. Some examples are wheels and axles and third class levers. Simple and complex machines. Machines can be either simple or complex.
In which condition machine acts as a force multiplier II speed multiplier?
Answer. Answer: a) A machine acts as a force multiplier when MA i.e. mechanical advantage (ratio of load and effort) is greater than 1 . a) A machine acts as a speed multiplier when VR i.e. velocity (ratio of distance of effort arm (de) and distance of load arm (dl) ) is less than 1 .
What is meant by saying that a machine is a force multiplier What is the ma such machines?
A machine having the mechanical advantage greater than one works as a force multiplier.
Can a simple machine act as a?
A simple machine cannot act as a force multiplier and a speed multiplier at the same time. The machine needs to be advanced. The efficiency of an ideal machine (free from friction etc.) is equal to 1. But in actual practical, the efficiency is less than 1 due to energy loss in friction.
When a machine works as a speed multiplier its VR?
(i) For a machine working as a force multiplier, displacement of load is less than displacement of effort. Thus, the velocity ratio is more than 1. (ii) For a machine working as a speed multiplier, displacement of load is more than displacement of effort. Thus, the velocity ratio is less than 1.
What will not change for a machine of a given design?
Answer: Velocity Ratio will not change for a machine of a given design. It is the ratio of velocity of effort to the velocity of load is called as the velocity ratio of the machine.
When a machine works as a speed multiplier its velocity ratio is?
Solution: (i) Displacement of load is less than the displacement of effort for a machine working as a force multiplier. Hence, the velocity ratio is more than 1. (ii) Displacement of load is more than displacement of effort for a machine working as a speed multiplier. Hence, the velocity ratio is less than 1.
What is the velocity ratio of single movable pulley?
2
What is the velocity ratio of pulley?
The theoretical mechanical advantage of a system is the ratio of the force that performs the useful work to the force applied, assuming there is no friction in the system. Velocity ratio is defined as the ratio of the distance moved by effort and load, in the same time interval.
What is the mechanical advantage & velocity ratio of a single movable pulley?
The input force is what force we apply to the machine and the output force is the force applied by a machine. Mechanical advantage can be defined as the ratio of the output force to the input force. For a single movable pulley, the velocity ratio is 2. So, the correct option is (B).
Why is a machine not 100 percent efficient?
Machine Efficiency Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work). The output work is always less than the input work because some of the input work is used to overcome friction. Therefore, efficiency is always less than 100 percent.
Is there a machine that is 100 efficient?
The short answer is: It can’t. Almost all machines require energy to offset the effects of gravity, friction, and air/wind resistance. Thus, no machine can continually operate at 100 percent efficiency.
What is perfect machine Why is this machine not possible in the real life?
An Ideal Machine is a machine which gives 100 percent efficieny that is entire input energy is converted into output energy. however this is not possible as some energy is lost due to friction, imperfect components and all. Therefore no machine is Ideal machine.
Which machine is not possible in real life?
A perpetual motion machine is a hypothetical machine that can do work infinitely without an external energy source. This kind of machine is impossible, as it would violate the first or second law of thermodynamics. These laws of thermodynamics apply regardless of the size of the system.
Can you get any ideal machine in practice?
Answer: In ideal machines , all the input energy should be converted to output energy . But , some part of energy is always lost in overcoming friction and input energy is always greater than output energy . Hence , no machine is ideal.
What is ideal machine in simple words?
The term ideal machine refers to a hypothetical mechanical system in which energy and power are not lost or dissipated through friction, deformation, wear, or other inefficiencies.
What is condition of actual machine?
The condition for a machine to be non-reversible or self locking is that its efficiency should be less than 50%. A screw jack used for lifting the load is a non-reversible machine or self locking machine.
Is pulley a ideal machine?
The term ideal machine is referred to those mechanical system in which no energy and power is lost due to friction, deformation etc. Hence pulley system is not an ideal machine.