Is it possible for the work output to be greater than the work input?
You can never get more work out of a machine than you put into it. In fact, a machine always does less work on an object than the user does on the machine. That's because a machine must use some of the work put into it to overcome friction.
Why can’t the output work for a machine be greater than the input work?
Work output can never be greater than work input. Machines allow force to be applied over a greater distance, which means that less force will be needed for the same amount of work. When a machine changes the size of the force, the distance through which the force is exerted must also change.
Can work input and work output be equal?
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, the work output is equal to the work input i.e the efficiency is 1.
Can output force be greater than input force?
Since machines do not reduce the work you do, your output work can never be greater than your input work. In some machines, the output force is greater than the input force. If a machine allows you to use less input force to do the same amount of work, you must apply the smaller input force over a greater distance.
Can energy output be greater than input?
No, according to the second law of thermodynamics, energy output can never be more than the energy input. Yes, according to the first law of thermodynamics, energy output can be more than the energy input. Yes, according to the second law of thermodynamics, energy output can be more than the energy input.
How can you increase the efficiency of a machine?
how could we increase the efficiency of machine? Decrease friction! Decreasing friction in the joints and moving parts is your best bet.
Which increases the work output of a machine?
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.
How can you increase the work output of a machine?
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.
In which of the levers is the output force greater than the input force?
Third Class Levers Advantage of Third Class Levers The advantage of a third-class lever is that the output force is applied over a greater distance than the input force.
How can there be less input force but more output force?
How is it possible for output force to be greater than input force? The smaller input force must be applied over a greater distance. How is it possible for output force to be less than input force? The larger input force must be applied over a shorter distance.
What happens if output is greater than input?
If the output voltage becomes higher than the input voltage, a large current may flow from the output to the input, which may damage the IC. This is caused by a parasitic diode in the internal transistor.
Is energy input always equals energy output?
So the ratio of energy output to energy input is always unity, or 100%. The meaning of the word 'useful' depends on the purpose of the device. For example, if the device is an electric heater, the useful energy output is heat, and the energy input is electricity. Electricity is converted to heat.
What reduces the efficiency of a machine?
Friction reduces efficiency because when two surfaces slide past each other, friction resists their motion, and in real machines, some input work is always used to overcome friction..
Which shows the relationship between work input and work output?
Which shows the relationship between work input and work output? input force x input distance > output force x output distance.
In what two ways can machines change the way work is done?
Machines can make tasks easier by the way it alters how work is done. First, machines can change the size of the force that is applied to the object and the distance over which work is applied. Second, it can also change the direction of a force.
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. In some machines, the output force is greater than the input force. If a machine allows you to use less input force to do the same amount of work, you must apply the smaller input force over a greater distance.
Can output power be greater than input power?
Yes by amplifiers you can increase the power output as compared to input.
Can output voltage be higher than input?
If the output voltage becomes higher than the input voltage, a large current may flow from the output to the input, which may damage the IC. This is caused by a parasitic diode in the internal transistor. The parasitic diode may turn on if the output voltage is higher than input voltage by its Vf.
What happens when energy intake is greater than energy output?
When energy intake exceeds energy expenditure, a state of positive energy balance occurs and the consequence is an increase in body mass, of which 60 to 80 percent is usually body fat (2).
How do you increase energy output?
Top 10 Energy Boosters
- Increase Your Magnesium Intake. …
- Walk Around the Block. …
- Take a Power Nap. …
- Don't Skip Breakfast — or Any Other Meal. …
- Reduce Stress and Deal With Anger. …
- Drink More Water and Less Alcohol. …
- Eat More Whole Grains and Less Sugar. …
- Have a Power Snack.
Can efforts be greater than load in a machine?
The effort is closer to the fulcrum than the load. The effort is always greater than the load. However, one advantage of such levers is that the distance moved by the load is greater than the distance moved by the effort.
How can you make a machine more efficient?
Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Oil is used to reduce friction between the moving parts of car engines. The use of oil makes engines more efficient.
How can we increase the efficiency of a machine?
how could we increase the efficiency of machine? Decrease friction! Decreasing friction in the joints and moving parts is your best bet.
Can simple machines increase the amount of work done on an object?
Although it cannot change the amount of work you do, a simple machine can change the amount of force you must apply to an object, and the distance over which you apply the force. In most cases, a simple machine is used to reduce the amount of force you must exert to do work.
What can you say about the output force of a machine with a mechanical advantage much larger than 1?
If the mechanical advantage of a machine is larger than one, the output force is larger than the input force. A mechanical advantage smaller than one means the output force is smaller than the input force.
How do you increase electrical output?
Increasing Amperage If your circuit contains chips known as resistors, you can lower resistance and therefore increase amperage by switching out the current resistor for a one with a lower rating. If your current resistor is 6 ohms, you can switch it out for a 4-ohm resistor.
Why the input power is more than the output power in a step-up transformer?
Complete answer: Reason- In a step-up transformer the output voltage at the secondary winding increases while the output current at the secondary winding decreases. So, there is both increase and decrees, hence there will be no change in the output power of the transformer.
What happens if output voltage is higher?
If the output voltage becomes higher than the input voltage, a large current may flow from the output to the input, which may damage the IC.
What happens if the input voltage is higher than?
Explanation: When input voltage is higher than reference voltage, the op-amp operates in open loop and diode become reverse biased. Thus, the output voltage will be equal to reference voltage.
What happens if energy intake is less than energy output?
When energy intake is less than energy expenditure; usually results in weight loss. The sum of daily caloric expenditure; includes basal metabolic rate (BMR), thermic effect of food (TEF), and physical activity.