yes, pulley will help IF not the if YOU USE COMBINE TWO OR MORE PULLEYS.
Yes, using a pulley or a system of pulleys will reduce the force needed to lift a brick (or anything). HOWEVER the distance that the rope (or whatever effects the pulley system) has to now travel further so that the energy required to lift the brick through an equal height is always the same.
Absolutely. four of the most basic machines do exactly that. A lever increases the force you exert by how close the fulcrum is to the object being move, and how far the applied force is away from the fulcrum. A screw transfers rotational force (torque) to a lifting force, and increases that force based on the pitch of the threads. A wedge increases lifting force based upon the pitch of the wedge from horizontal. A pulley, when using more than one, will increase the applied force, on an order of magnitude equal to the number of pulleys used. **Note: the total work applied equals the total work transmitted less friction. The force applied times the acceleration equals the work, the machines reduce the acceleration to increase the force transmitted.
To find the mechanical advantage of a simple machine divide output force by input force. (input force is the force that we exert on a machine, and output force is the force that is exerted by a machine).
The strength of your arm is the applied force on a screwdriver.
It increases the applied force and changes its distance and direction. -Novanet
More force is exerted with one pulley.
A single pulley only changes the direction of the applied force. A second or more pulleys on the same rope will multiply the force applied by decreasing the distance of the applied force. This arrangement is called a block and tackle. Two pulleys double the force and halve the distance the force acts upon the mass. Three will triple the force while reducing the distance by 1/3, and so on. If 1 pound of force is applied to a rope with four pulleys on it over the distance of 10 feet of rope it will raise a 4 pound weight 2 1/2 feet.
A single pulley only changes the direction of the applied force. A second or more pulleys on the same rope will multiply the force applied by decreasing the distance of the applied force. This arrangement is called a block and tackle. Two pulleys double the force and halve the distance the force acts upon the mass. Three will triple the force while reducing the distance by 1/3, and so on. If 1 pound of force is applied to a rope with four pulleys on it over the distance of 10 feet of rope it will raise a 4 pound weight 2 1/2 feet.
When used appropriately, a pulley can be used to reduce the amount of force needed to move an object. By using multiple pulleys, one can change the direction that force needs to be applied to move an object, as well as reducing the amount of force that is necessary through mechanical advantage.
Pulleys reduce the force required to lift heavy objects.
There are a variety of different designs for pulleys, depending upon what you need to do with them. A pulley can be used to change the direction of a force without changing the amount of force that you apply, but there are also pulleys that do reduce the amount of force you have to use to lift something.
Pulleys helps changing the direction of the applied force. The most common example is drawing a bucket of water from a well. Without the pulley it would be laborious to pull a bucket full of water out of the well. With the pulley our applied force's direction change and we can now happily pull the water out of the well.
by increasing distance over which the force is applied
IMA for pulleys is the resistance force divided by the effort force.
Absolutely. four of the most basic machines do exactly that. A lever increases the force you exert by how close the fulcrum is to the object being move, and how far the applied force is away from the fulcrum. A screw transfers rotational force (torque) to a lifting force, and increases that force based on the pitch of the threads. A wedge increases lifting force based upon the pitch of the wedge from horizontal. A pulley, when using more than one, will increase the applied force, on an order of magnitude equal to the number of pulleys used. **Note: the total work applied equals the total work transmitted less friction. The force applied times the acceleration equals the work, the machines reduce the acceleration to increase the force transmitted.
Then the resistance is greater than the applied force. It happens all the time - like if you hit your head against a brick wall!
The force a lever can apply to a given point greatly depends on two distances:The distance from the pivot point to the object to be lifted and the distance from the pivot point to the point on the lever where force will be applied.To reduce the distance from the pivot-point to the point where Force is applied is to reduce the "force" of a lever.
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.____________________________________________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.