Solution: Work input is work done on a machine to get the desired output. Work output is the amount of desired work that is done by a machine. For an ideal machine
Why is the work input not equal to the work output?
Although nearly equal, the output work is less than the input work
because of friction
. All machines use some amount of input work to overcome friction. The only way to increase the work output is to increase the amount of work you put into the machine. You cannot get more work out of a machine than you put into it!
Solution: Work input is work done on a machine to get the desired output. Work output is the amount of desired work that is done by a machine. For an ideal machine
Is work output always less than work input?
Although nearly equal, the output work is
less than the input work because of friction
. All machines use some amount of input work to overcome friction. The only way to increase the work output is to increase the amount of work you put into the machine.
Can you make the work output of a machine greater than the work input?
The only way to increase the work output is
to increase the work input
. You can’t get more work out of a machine than you put into it. The moving parts of a machine must use some of the work input to overcome friction. Because of friction, the work output of a machine is always less than the work input.
When work is done work output?
In physics, work output is the work done by a simple machine, compound machine, or any type of engine model. In common terms, it is the
energy output
, which for simple machines is always less than the energy input, even though the forces may be drastically different.
What is the formula of output work?
The formula calculating work output is
F*D/T
, where F is the force exerted, D is the distance and T is the time. The work output of a system is also described as its Power.
Why is output power less than input power?
The
output work is always less than the input work because some input work is used to overcome friction
. Therefore, efficiency is always less than 100 percent. … Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work).
Why Ma is always less than VR?
The mechanical advantage(M.A) of a real machine is always less than its velocity ratio(V.R)
because mechanical advantage decreases due to the friction and weight of moving parts of the machine
whereas the velocity ratio remains constant. … Because of friction, air resistance, this Ideal situation would never be achieved.
Do all machines make work easier?
Contrary to popular belief, machines do not increase the amount of work that is done. … Machines
make work easier by increasing the amount of force that is applied
, increasing the distance over which the force is applied, or changing the direction in which the force is applied.
Why is no machine 100 efficient?
Explanation: No machine is free from the effects of gravity, and even with wonderful lubrication, friction always exists. The energy a machine produces is always less than the energy put into it (energy input). … That is why 100% efficiency in machines
shall not be possible
.
What force is responsible for the repulsion between two positively charged?
Coulomb force
, also called electrostatic force or Coulomb interaction, attraction or repulsion of particles or objects because of their electric charge.
How is the energy of an object affected after work is done on it?
Work changes the amount of mechanical and internal energy possessed by objects. When work is done on a system or object,
energy is added to it
. When work is done by a system or object, it gives some of its energy to something else. Throwing a ball means a hand applies a force as an arm swings forward.
What is the useful work output?
efficiency
. The efficiency of a machine is the ratio of useful energy output to total energy input, or the percentage of the work input that is converted to work output. Efficiency can be expressed as the ratio of useful work output to total work input.
How do you calculate useful work output?
The work efficiency formula is
efficiency = output / input
, and you can multiply the result by 100 to get work efficiency as a percentage. This is used across different methods of measuring energy and work, whether it’s energy production or machine efficiency.
What is output force?
The output force is
the force that you would need to lift the object without the inclined plane
. This force is equal to the weight of the object.
