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Pulleys
A pulley is a mechanism composed of a wheel on an axle or shaft. A rope, or cable usually runs over the wheel and inside the groove. Pulleys are normally used to change the direction of an applied force to make the work easier. It is one of the six simple machines.
1,797 Questions
Does a winch with more rope lift a load with least effort?
A winch with more rope allows for greater mechanical advantage, making it easier to lift a load with less effort. It increases the distance the winch can pull the load with each turn, reducing the force required on the winch handle to lift the load.
What is an example of a pulley in the bedroom?
An example of a pulley in the bedroom could be a ceiling fan. The mechanism that controls the speed and direction of the fan is typically operated using a pulley system.
Where is the output and input force on a wheel and axle?
The input force is applied to the wheel, typically by turning a handle or crank attached to the wheel. The output force is generated at the axle, where the wheel is connected, and this force is used to move or lift objects. Essentially, the input force is where the energy is applied, while the output force is where the resulting work is done.
How does pulley make work easier?
A simple example is to imagine you're sitting on a swing attached to a rope and the rope goes up over a pully attached to the ceiling and back down. You could pull down on the other end of the rope to pull yourself up. It turns out the force you pull down with is only half of your weight, and it is actually pretty easy!
My first year physics prof did this demo and pulled himself up 30ft to the ceiling in a large classroom. Why is it easy? If you look at the forces on the pully in isolation, the force pulling up on it must be equal to your weight (call this force W). There are two downward forces from the two ends of the rope hanging down which must balance the upward force. When you're not accelerating the forces on the ends of the rope are equal. Let the rope forces equal R. You get the following equaltion:
W = 2R
R = W/2
Using a wheelbarrow can make it easier to lift a heavy object by?
Yes it does make it easier by using a fulcrum Yes it does make it easier by using a fulcrum
What is the definiton of output force?
An output force is the force that is exerted from the input force to create motion of the resisting object.
the input force can be less or more then the output force
How many types of friction are there?
There are four main types of friction: static friction (when object is not moving), kinetic friction (when object is moving), rolling friction (when object rolls on a surface), and fluid friction (opposes the motion of an object through a fluid).
The mechanical advantage (MA) is calculated as the ratio of the output force to the input force, or the distance the input force acts over compared to the distance the output force moves. The formula for mechanical advantage is MA = output force / input force = input distance / output distance.
What is an example of a movable pulley?
An example of a movable pulley is a flagpole. When you pull down on one end of the rope, the pulley at the top of the flagpole moves with the flag, making it easier to raise and lower the flag.
No, a pulley is not a lever. A pulley is a simple machine that consists of a wheel with a groove and a rope or cable. It is used to lift or move objects by changing the direction of the force applied. On the other hand, a lever is a rigid bar that pivots around a fixed point to help magnify force or change direction.
What are some examples of fixed pulleys?
one example is a flag pole, the load is the flag and the force is on the rope
another is a simple pulley crane, or a rockclimbing rig.
Input force is a force exerted on a machine.
the definition is really simple . it is the force you put in something
input forceforce exerted on a machine.
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i need this answer for science homework, it's not very helpful
to gain mechanical advantage. So you dont need to apply as much force to move something.
A pulley halves the ammount of force needed, but you need to pull a rope twice as far to move the object the same distance.
What are the uses of double pulley in physics?
The amount of force required to lift a weight is inversely proportional to the number of suspension lines. A multiple pulley system allows the load to be distributed across several lines and greatly reduces the amount of force required to lift the weight..
The load that takes mechanical power to lift with a single pulley can be lifted by a single person with a multiple pulley set-up
An output force is the force exerted by a machine or mechanical system to perform a task. It is the force that is produced as a result of the input force applied to the system. This force is responsible for the movement or work performed by the system.
What are the uses of a single pulley?
A single pulley can change the direction of a pulling line. The direction change may help in pulling the line over a corner or around an obstacle. Or the direction change may allow better use of the available pulling force. Also, the single pulley can relocate the pulling point.
For example, suppose we wish to lift a weight some distance into the air. If I am the pulling force, then my first problem is that I cannot lift the weight any higher than I can reach. But if the pulling line is looped over a pulley some distance above my head, relocating the pulling point, I can potentially lift the weight just about up to the pulley's height. And now the pulley has given me another advantage. I can leverage my own weight, pulling down on the line, to lift the weight upward.
When was the block and tackle invented?
The block and tackle system has been used for centuries, with origins dating back to ancient times. However, the modern design and use of block and tackle systems began to emerge during the Renaissance period in the 15th century. It provided a mechanical advantage in lifting heavy loads and has since become a fundamental tool in various industries.
How do you get the mechanical advantage of a screw?
The mechanical advantage of a screw can be found by dividing the circumference of the screw by the pitch of the screw. In this case, the total mechanical advantage is equal to the circumference of the simple machine to which the effort force is applied divided by the pitch of the screw.
Who invented the compound pulley?
The compound pulley system was invented by Archimedes, an ancient Greek mathematician, around the 3rd century BC. Archimedes is also known for his contributions to geometry, physics, and engineering.
Output force is the force exerted by a machine or mechanism to accomplish a task. It is the force that is produced by the system as a result of input force, mechanical advantage, and efficiency of the system. The output force can be calculated using the formula: output force = input force x mechanical advantage.
How does a pulley make your life easier?
A pulley can make your life easier by allowing you to lift heavy objects with less effort. By utilizing the mechanical advantage provided by a pulley system, you can distribute the weight of the load across multiple ropes and pulleys, reducing the amount of force required to lift the object. This can make tasks like lifting furniture, hoisting equipment, or raising sails much more manageable.
This is a very open question. Physics is the subject dealing with the interactions of matter and energy.
If we were investigating the acceleration due to gravity, we might use an inclined board (moving at a steady rate) and a ball that would leave a track as it passed over.
If we were investigating pulley systems, some weights and pulleys, and perhaps a spring balance.
The apparatus may be quite simple. Einstein made observations on Brownian motion; observations of smoke particles under a microscope!
Rutherford's student-experimenters, Marsden and Geiger, used a partly collimated radium source, a gold foil, and a ZnS scintillation screen; for the observations which gave us our current model of the atomic nucleus.
The essence is that the critical part is the intellectual insight, not the complexity of the apparatus.
An output force is the force exerted by a machine or system to achieve a desired outcome or perform a specific task. It is typically the end result of a series of mechanical processes or actions within the system.
