The choices are:
A. Doubles the force required to lift the block
B. Decreases the force required to lift the block
C. 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
The sum of all rope tensions on one pulley must add as vectors to equal the weight the supported load. Sine in a fixed pulley, the load weight is a tension, the pulling force must be equal to the weight load, but is in a different direction. Basically, a fixed pulley lets you pull down to lift a load.
It makes the block easier to lift by changing the direction of the force needed to lift it.
A single fixed pulley can change the direction of a force, but not its magnitude.
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.
You have to have the right size pulley for the weight of the object you want to move and a secure place to attach it. Then, once it's all hooked up, you'll need to generate the force to pull on the rope or cable that will then move your object. If it is more than you can produce with your body, you can attach an engine to it and let it do the work.
The major two types of simple pulleys are movable and fixed. An example of a fixed pulley would be a flag pole. The pulley is fixed in place while someone pulls on one end of the rope to lift the flag on the other end, the input force and the output forces being equal in magnitude but opposite in direction.
A chain block is a device where a chain runs through an overhead steel pulley block and can be used to lift things and be locked into place. A very useful tool .
The cabin of the lift is raised (and lowered) by a pulley. The pulley has a counterweight, which weighs as much as an empty cabin. Therefore, the wheel at the top of pulley does not need to lift the entire weight of the cabin - just the extra load in the cabin.
It makes the block easier to lift by changing the direction of the force needed to lift it.
A fixed pulley is a pulley that is attached to a support. It does not reduce the effort needed to lift the load, but rather changes the direction of the applied force.An example of a fixed pulley would be the rope pulley on a well. This is a fixed pulley because the pulley doesn't move (it is attached to the overhead structure).
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.
this is berat writing.we use fixed pulley for lifting load up only by using force on the effort that makes the load lift
A fixed pulley does not make the force applied easier, it changes the direction of this force. For example, instead of bending over and lifting and object, a fixed pulley lets you lift it by pulling down on a rope.
no
connetions academy huh?
Sailors used a pulley called "block and tackle" to lift heavy cargo.
You have to have the right size pulley for the weight of the object you want to move and a secure place to attach it. Then, once it's all hooked up, you'll need to generate the force to pull on the rope or cable that will then move your object. If it is more than you can produce with your body, you can attach an engine to it and let it do the work.
The mechanical advantage of the block and pulley you are using, or the engine of the fork lift truck if that is what you are using.
If the pulley is fixed (hanging from the ceiling), and the rope passes over it, then 100 lbs of force is required. If the rope is fixed to the ceiling and passes under the pulley (which is fixed to the load), then 50 lbs of force is required.
The difference between a fixed pulley and a movable pulley is, the wheel of a fixed pulley does not move because the wheel is attached to a wall, ceiling, or other object. Unlike a fixed pulley, a movable pulley's wheel does move. The wheel on a movable pulley is not attached to a wall or other object. A fixed pulley changes work by changing the direction of a force. A movable pulley changes work by reducing the input force needed to lift heavy objects. A movable pulley changes the direction of the input force and reduced it. A movable pulley also increases the output force.