What does AMA stand for?
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What is the AMA of the machine?
The AMA of a simple machine is the ratio of output to input forces. The IMA is the ratio of input distance to output distance.
What is the AMA of the inclined plane?
For the inclined plane the output load force is just the gravitational force of the load object on the plane, its weight Fw. The MA of an ideal inclined plane without friction is sometimes called ideal mechanical advantage (IMA) while the MA when friction is included is called the actual mechanical advantage (AMA).
What is AMA in engineering?
actual mechanical advantage = resistance force. AMA = FR. effort force.
Can AMA be higher than IMA?
The mechanical advantage (MA) of a machine is the factor by which it multiplies any applied force. In any real machine some of the effort is used to overcome friction. Thus, the ratio of the resistance force to the effort, called the actual mechanical advantage (AMA), is less than the IMA.
How do you find AMA of a pulley?
To calculate the mechanical advantage of a pulley you simply have to count the number of rope sections that support whatever object you are lifting (not counting the rope that is attached to the effort). For example, in a one pulley system the MA is 1. In a two pulley system the MA is 2.
Can you have negative work?
Work is a measurement of energy, so it may seem odd to think that a work can be negative — but it can! Work is how much energy is done by a force over a distance. If you try to stop the net from moving, you will apply a force in the opposite direction that the net is moving. …
What does it mean when work done is negative?
If the direction of motion and F| are opposite, then negative work is being done. This means that energy is transferred in the opposite direction. For example, if you try to push a car uphill by applying a force up the slope and instead the car rolls down the hill you are doing negative work on the car.
When work is done on a system?
Thus we define work as being positive when the system does work on the surroundings (energy leaves the system). If work is done on the system (energy added to the system), the work is negative.
How do you calculate work from a PV diagram?
We can find the work done by determining the total area under the curve on a PV diagram. We have to make sure we use the total area, all the way down to the volume axis. For instance, we can imagine viewing the area under the curve in the example shown above as a triangle and a rectangle (as seen below).