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A single pulley normally gives no mechanical advantage: it changes the direction of the force required.
With 2 pulleys the rope or cable is looped around both so that there are several lengths of it pulling the mass. If there are k such strands, each one bears 1/k of the total mass so (if you ignore friction) there is a mechanical advantage of k.
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The mechanical advantage of two pulleys mounted in a block and tackle is twice the applied force. The lead rope needs to have half the force applied to move the same load, but twice the distance must be moved on the lead rope such that the same total force is applied to the load.
What else can I help you with?
What is the disadvantages of movable pulleys?
movable pulleys sometimes don't have a directional advantage so you have to pull up and you can't use a weight as the effort and whoever said this its wrong so next time USE THE TEXT BOOK STUPID PERSON sorry about this my friend can be mean.
Can a pulley system provide both a directional advantage and mechanical advantage at the same time?
Yes, a pulley system can provide both a directional advantage (changing the direction of the force) and a mechanical advantage (increasing the output force) simultaneously. By adding more pulleys to the system, you can reduce the amount of force needed to lift a heavy object while also changing the direction of the force applied.
How machines make work easier?
Simple machines using pulleys and levers, make the work easier by using mechanical advantage. The input force is less than the output, but spead over a larger distance and time. Other machines harness engines and motors, to take over the human input. The motors and engines need a separate source of energy.
What is the disadvantage of pulleys?
movable pulleys sometimes don't have a directional advantage so you have to pull up and you can't use a weight as the effort and whoever said this its wrong so next time USE THE TEXT BOOK STUPID PERSON sorry about this my friend can be mean.
What is the advantage of using scientific notation?
An advantage of using the scientific notation is that scientists have to use large and small numbers and this helps them by showing the number in a smaller way.
What are the advantage and disadvantage of the transportation?
One advantage of using transportation is that is quick. One disadvantage of using transportation is that it is expensive.
What is another term of Advantage and disadvantage?
The difference between and advantage and a disadvantage can be very significant. An advantage means you have the upper hand in a situation usually only one person can have a particular advantage. A disadvantage can be an obstacle that more than one person can have at the same time.
Adventages of verbal communication?
Verbal communications have the advantage of expressing feelings by using words and gestures at the same time. You can talk to a large audience and point at different people while talking.
What is the advantage of using shortcuts?
You move your hands less and save time when performing commands.
What is an advantage of using credit to buy a car?
You get to pay for the car over a period of time.
Advantage of speaking rather than writing?
If you write and not speak, you can't share your ideas that might be helpful.
Can you use the birth control patch if you're on the birth control pill?
There is no advantage to using the birth control patch and birth control pill at the same time. They have the same mode of action. If you want to double up on methods, try using a barrier method like condoms along with a hormonal method.
