Can work input and work output be equal?

Can work input and work output be equal?

Solution: Work input is work done on a machine to get the desired output. For an ideal machine, the work output is equal to the work input i.e the efficiency is 1.

How is work output related to work input?

Work input is defined as the effort force multiplied by the distance across which the force is exerted to a machine. Work output is defined as the resistance force multiplied by the distance over which the force is applied. The work output of an ideal machine is equal to the work input, i.e. efficiency.

Is work input more than output?

The work output of a machine can never be greater than the work input. Some of the work done must be used to overcome the friction created by use of the machine. The less work a machine has to do to overcome friction, the more mechanically efficient the machine is.

Can the output force be greater than the input force?

Since machines do not reduce the work you do, your output work can never be greater than your input work. How is it possible for output force to be greater than input force? The smaller input force must be applied over a greater distance. The larger input force must be applied over a shorter distance.

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.

How did the work output relate to the work input for the pulleys?

In a pulley system without friction, work input equals work output: Work (in) = Work (out). It will be necessary to determine force when you want to calculate the work input in a pulley or a system of pulleys. Work is determined by multiplying force by distance traveled: Work (W) = Force (F)X Distance (d) W=Fd.

Why is output less than input?

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).

How do you calculate work input and work output?

Write down the law of work input and work output. In a pulley system without friction, work input equals work output: Work (in) = Work (out). Attach a known mass to the other end of the cord. It will be necessary to determine force when you want to calculate the work input in a pulley or a system of pulleys.

In which simple machine is output work greater than input work?

(a) In the case of the wheelbarrow, the output force or load is between the pivot and the input force. The pivot is the wheel’s axle. Here, the output force is greater than the input force. Thus, a wheelbarrow enables you to lift much heavier loads than you could with your body alone.

What are two examples of machines for which the output force is greater than the input force?

Mechanical Advantage and Type of Machine For machines that increase force — including ramps, doorknobs, and nutcrackers — the output force is greater than the input force. Therefore, the mechanical advantage is greater than 1.

Why is the work output of a machine always less than the work input of the machine?

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!

How can you make the work output of 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.

Why is the output work greater than the input work?

When you input force to do work, the output work cannot be greater than what is put in, because work is energy, and energy is ‘conserved’. That means it can’t be created out of nothing. If you had a box that could put out more work than you put in, you would be king of the world.

How are input and output related to efficiency?

Input refers to the amount of energy put into a device, and output refers to the amount of energy that comes out. A device may change the type of energy but not the amount. For example, a light bulb’s input energy is the form of electrical energy, and its output energy is in the form of light and heat. Efficiency

How are input and output related to each other?

Input​refers to the amount of energy put into a device, and ​output​refers to the amount of energy that comes out.  A  device may change the type of energy but not the amount.

Can a small input force accomplish a large output force?

That is, a small input force can accomplish a task requiring a large output force. But the constraint is that the small input force must be exerted through a larger distance so that the work input is equal to the work output.