First, because there is NO way to reduce the minimum amount of energy required to complete a task. You can't get something for nothing. But also because often it is easier to apply force (aka do work) in one direction and not another, like when using a pulley. You direct force down to lift a load up. It is also sometimes easier to apply a little force for a longer distance than apply and large force very quickly, like while pushing something up an inclined plane, wedge, or screw. Other times, it is necessary to exchange force for speed. Baseball players are very strong, but their arms cannot physically move as fast as they need to go to propel the ball, so they apply a lot of force in moving the bat, which moves very fast. The opposite is also true. In a screw driver, speed is not important but force is. Your hand moves the screw driver relatively quickly while the screw driver applies a larger force at a much slower rate.
If the machine doesn't decrease the amount of work that you do, it might still improve the quality of the final result of your efforts.
No, a machine does not decrease the amount of work done. In fact, machines are designed to make work easier by changing the direction or magnitude of the force applied. They allow us to accomplish tasks more efficiently and with less effort.
a machine does NOT decrease the amount of work one does, rather, it changes the way one does work in some way. for example, if one were to use a lever to lift a weight, the object would have to go farther to get to the desired height, but it would require less energy to move, so all in all, it would even itself out, (unless you include friction and other laws of physics, then, it would require more work).
Simple machines make work easier by allowing us to apply force over a greater distance, but the amount of work done remains the same. This means that while we may exert less force when using a simple machine, we still need to exert the same amount of work.
dont buy or use so much
To calculate the work output of a machine, you can use the formula: Work output = (force applied) x (distance moved in the direction of the force). This formula takes into account the amount of force applied and the distance over which the force is applied to determine the work done by the machine.
The most common exercise machine to run on would be the treadmill. You can use this machine at various speeds and inclines to increase or decrease your workout. They also have timed programs you can choose as well.
Machine B will use more power.
You can reduce the amount of papers used, decrease the amount of bags and use your own cloth bags, and you can reduce the amount of paper plates and cups and use your own.
No, you cannot rent a die-cutting machine to use for a short amount of time. You can go get it professionally cut or you can buy your own machine to use.
You would use thermal isolation.
A franking machine is used to print an ink version of a stamp either on sticky labels or directly onto an envelope. The machine HAS to be taken to a post office to be credited with an amount of postage, which is paid for when you present the machine. The unit is sealed and returned to you. To use it, you simply dial the amount of postage you want printing, using small dials or wheels. Every time you feed a label or envelope through the machine, it prints the displayed postage onto it - deducting that amount from the credit left.