A pulley system is marked with a Mechanical Advantage of 2.5. A worker applies 450N to the pulley in an attempt to lift a sound system with a 1500N weight. Of this task we could say that:
The work done by the worker will be lower than the work done by the pulley system while lifting the sound system.
It is impossible ta lift the sound system using a pulley system, you must use a third-class lever.
It is impossible to lift that much weight with this system so no movement should be observed.
The mechanical advantage must be incorrect, as the mechanical advantage can not have decimals
The work done by the worker will be lower than the work done by the pulley system while lifting the sound system.
Work is equal to the blank times the blank
Force, distance
Distance, time
Effort, resistance
Time, force
Work is equal to the force times the distance.
Is this correct? If so please provide an explanation
Apologies for the confusion caused by my previous response. Allow me to clarify.
Yes, the correct relationship for work is that it is equal to the force exerted multiplied by the distance over which the force is applied. This can be mathematically represented as:
Work = Force x Distance
In the context of the question, when a worker applies a force of 450N to the pulley system in an attempt to lift a 1500N weight, the work done by the worker will actually be higher than the work done by the pulley system.
To understand this, we can use the concept of mechanical advantage. Mechanical advantage is defined as the ratio of the load (resistance) to the effort (force applied). In this case, the mechanical advantage is 2.5, which means that for every 2.5 units of force applied, the pulley system can lift 1 unit of load.
Using the formula for mechanical advantage, we can calculate the effective force applied by the pulley system:
Mechanical Advantage = Load (Weight) / Effort (Force)
2.5 = 1500N / Effort (Force)
Effort (Force) = 1500N / 2.5
Effort (Force) = 600N
So, the pulley system exerts an effective force (effort) of 600N while lifting the 1500N weight. Comparing this to the worker's force of 450N, it is evident that the pulley system is doing more work than the worker.
Select one simple machine from the image below, explain how it works, and provide one way you can increase the efficiency of the machine. In your response be sure to explain the meaning of the following terms: Simple machine, and efficiency.
The one I chose was Lever
A lever is a simple machine that consists of a rigid bar or beam that pivots around a fixed point called the fulcrum. The lever has two arms: the effort arm and the load arm. The effort arm is where the input force or effort is applied, and the load arm is where the output force or load is applied. The position of the fulcrum and the relative lengths of the arms determine the mechanical advantage and the efficiency of the lever.
Efficiency is a measure of how well a machine converts input work or energy into useful output work or energy. It is calculated by dividing the output work or energy by the input work or energy, and then multiplying by 100 to express it as a percentage.
To increase the efficiency of a lever, you can do the following:
1. Reduce friction: Lubricating the fulcrum and the points of contact between the lever and other surfaces can minimize friction. This allows the lever to move more smoothly and with less resistance, increasing its efficiency.
2. Optimize leverage: Adjusting the distance between the fulcrum and the effort arm or load arm can optimize the mechanical advantage and efficiency of the lever. By positioning the fulcrum closer to the effort arm or farther from the load arm, you can increase the leverage and subsequently the efficiency of the lever.
By implementing these measures, you can improve the overall efficiency of the lever by reducing energy losses due to friction and maximizing the mechanical advantage.
Match the word with the descriptor
Input force:
Output force:
Work: Force x Distance
Effort:
Fulcrum:
DRAG & DROP THE ANSWER
Describes the input force
Force that you apply to the simple machine
Force that is applied to the object
The pivot for a lever
Input force: Describes the input force
Output force: Force that is applied to the object
Work: Force x Distance
Effort: Force that you apply to the simple machine
Fulcrum: The pivot for a lever