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I think you mean "a one pulley system." When you want to pull in the opposite direction you want the object to move. If you tow a log behind a vehicle you don't use one so the log follows the car. But, if you wanted to lift that log you would throw the rope over a tree branch or pulley to lift it into the air as you pull down, thus using your weight with gravity to help lift the log.
However, by attaching the pulley to the tree branch, you don't gain any mechanical advantage other than using gravity with pulling down.
If, on the other hand, you attach your one pulley to the log, attach one end of the rope to the tree branch, and lift up with the other end you do gain mechanical advantage with it requiring half the force of the previous example of pulling down. But, you are limited by working against gravity and you can only lift as high as you are standing.
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Can you use belt and pulley in two wheelers?
It would depend on what you want to use the belt and pulley for
More information of uses of pulley?
Pulley systems are used in the real world to lift large masses onto tall heights. You might have seen the workers repairing the roof of a house and using the pulley system to lift their tools or materials to the roof. A pulley is an example of a simple machine.The pulley system consists of one or more pulleys and a rope or a cable. The number of pulleys used may increase or decrease the mechanical advantage of the system. Generally, the higher the mechanical advantage is, the easier it is to lift the object that is being lifted.Overall, no matter how easy it is to use the pulley system, the system itself is not very efficient due to the force of friction. For example, one has to pull two meters of rope of cable through the pulleys in order to lift an object one meter.The applet below illustrates just that. Select the number of pulleys and drag the mouse to see the inefficiency of the system.
Would you use a fixed pulley or movable pulley to lift a heavy load?
Fixed if it weighed as less than you, but a movable pulley wouldn't be helpful here. You'd be best with a pulley with multiple supporting ropes.
What simple machine allows you to use a cord wheel and hook?
That would be a pulley.
Do you use more force using 1 pulley to pull an object or 1 or more pulleys?
More force is exerted with one pulley.
1 pulley system more efficient then a 2 pulley system?
Efficiency is the proportion of energy usefully used. Using a pulley system does not use less energy it just changes the ammount of force. Pulleys do have a small ammount of friction so having just one pulley would be more efficient. (but not much more)
What are some good questions about a pulley?
If someone needs to use a pulley system to move or pull an object, there are a few important questions to ask about the pulley system. It is important to know, how much force the pulley system can withstand, and if the straps on the pulley system can secure the object you are moving.
How much effort force would you use to lift a kg weight with a fixed pulley system?
a lot
What are some advantages of using gears and a chain system on a bicycle instead of a pulley system?
Chains mesh with sprockets without slipping. A pulley system would need to use higher tension(and suffer higher losses) to avoid slipping.
How can force be reduced?
A pulley system.
How much effort force would you use to lift a 300-kg weight with a moveable pulley system?
150
Can you use belt and pulley in two wheelers?
It would depend on what you want to use the belt and pulley for
How much effort force would you use to lift 300 kg weight with a fixed pulley system?
a lot
How much effort is needed to lift a 75 N weight using the pulley system?
If you are talking about a simple pulley with the pulley attached and load rope attached to the object then you will need a little more than 75N of force. Lifting an object (at a constant velocity) requires a force equal but opposite the weight of the object. With any simple machine you will need to do more work to overcome friction. If you were to use a single pulley with the pulley attached to the object then you will need a little more than 37.5 N. If you were to use a multiple pulley system then you would need to know the mechanical advantage of the pulley system.
One common use for a pulley is?
a.raising a flagpole
What metric system would you use if you wanted the mass of a man?
The is only one Metric System. That is the one you would use. The units you use to measure mass is the kilogram (Kg).
How would someone use Windows PE?
Windows PE is a preinstallation environment and works as an operating system. One would use this system in the same way one would use other Windows packages.
