0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
What does pulley do?
The pulley is a simple machine. The purpose of a pulley system is to be able to move a heavy object with less effort. It is made up of a rope or belt that is wrapped around wheels. The wheels are attached to brackets on the sides so that they can turn freely. The brackets are attached to fixed points, such as a ceiling, or in some cases to the object being lifted. The rope is pulled from one end and makes its way through the pulley, while the object is lifted on the other end. The more pulleys that are used, the less effort is needed to lift the object. However, if more pulleys are used, then more rope must be pulled to move the object as far.
What must happen in order for a person to lift an object?
Strength!other than strength ?
How work done against gravitational force?
Lift any object. Grav. force is acting down, you must apply an upward force to lift the object. Work is force applied through a distance, so work is done if you lift it, but not if you hold it still.
How does a pulley make work easier?
1) it doesn't. Work = force x distance. So a pulley that reduces force will also increase distance -but -it can reduce the force needed to move somethingthus making life easier.Answer:It depends on the number of pulleys and their arrangement. A single pulley does not change the force required to lift something. But, other pulley arrangements do. Four pulleys can be arranged into a thing called a block & tackle that can divide the force required to lift something by four. But, the rope must be extended four times as long to do this.
What does it mean for an object to be heavy?
It has enough weight under Earth-like gravity that one must exert themselves considerably to lift it.
If you used 300 N of force to lift the fish using a pulley what is the mechanical advantage of the pulley?
You must also know how much the fish weighs. The idea is to divide the weight of the fish, by the 300 N of force you are applying. That will be the mechanical advantage.
A fixed single pulley that is used to lift a block does what?
The choices are:A. Doubles the force required to lift the blockB. Decreases the force required to lift the blockC. Makes the block easier to lift by changing the direction of the force needed to lift it.D. Decreases the force required and changes the direction of the force required
What best describes what must happen in order for a person to lift an object?
The force of gravity must be greater than the mass of the object
What does pulley do?
The pulley is a simple machine. The purpose of a pulley system is to be able to move a heavy object with less effort. It is made up of a rope or belt that is wrapped around wheels. The wheels are attached to brackets on the sides so that they can turn freely. The brackets are attached to fixed points, such as a ceiling, or in some cases to the object being lifted. The rope is pulled from one end and makes its way through the pulley, while the object is lifted on the other end. The more pulleys that are used, the less effort is needed to lift the object. However, if more pulleys are used, then more rope must be pulled to move the object as far.
To lift the engine 3 meters the operator must pull a total of 30 meters of chain through the pulley system?
Yes, I am pretty sure that such pulley systems exist.
What must happen in order for a person to lift an object?
Strength!other than strength ?
Which statements best describes what must happen in order for a person to lift an object?
The force of gravity must be greater than the mass of the object
A pulley system is used to lift a 2000 newton engine up a distance of 3 meters. The operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. To lift the engine 3?
What is the value of Wi? 7,500 joules
The amount of force that you must use on an object to lift it is?
Any force greater than its weight.
How work done against gravitational force?
Lift any object. Grav. force is acting down, you must apply an upward force to lift the object. Work is force applied through a distance, so work is done if you lift it, but not if you hold it still.
What are pulleys used?
removing genital warts aka jamesman pulleys are things that lift up thing in a less painfull waya mechanical advantage as far as liftingin wellsElevators, cranes, vacuums, and motors of all types, just to name a few.elevatersa pulley is use to lift loads, apply forces, and transmit power.to make work easier and to lift thing heavier than you and moveable pulleys are used the zipline and cloths lines but what in comes done to is it is a simple machine. answer improved by:kidwhoanswersyou use a pulley to lift a car engineA pulley can be used in a number of ways. The most common use of a pulley, however, is when one needs to lift large, heavy objects, usually with a truck or other large vehicle.the uses of pulley is to carry things above and below and to make distribution of things easier.Pulleys afford a mechanical advantage in, for example, the lifting of heavy or awkward loads to various heights. While pulleys are not particularly efficient (energy is lost to friction, and the pulleys and cables/ropes add their own weight to the load lifted), they allow the application of a lesser force over a greater distance.The effect of a pulley is analogous to the gears of a bicycle; a lower gear makes it easier to turn the pedals, but they must be turned more often for the bicycle to travel the same distance. Likewise, a pulley system makes it easier to lift a load, but the length of cable used to lift the load is greater than the distance the load is lifted. The more pulleys that are used, the easier it is to lift the load, but the longer the length of cable needed to lift the the same distance.Examples of pulley usage in the real world include:- lifting heavy machinery, materials, and tools to heights at building sites.- hoisting patients between a bed and wheelchair using a sling attached to pulleys, allowing the task to be undertaken by a single person.whatpulley is made of picking something upA pulley is a big wheel. It is easier to pull a rope down that to lift something up. Thus, it is easy to attach a rope to a heavy object and throw the rope around the pulley. Then you pull down on the rope. The heavy object goes up.It is used to pull things up or downThe pulley is currently used to easily lift items and objects.
When using a film camera what must you do to bring an object focus?
cows
