Yes you do because W = F . d meaning if you are applying a force to something over a distance then you are doing work on it
Note: This answer addresses simple machines, such as levers, pulleys, and ramps - it does not address complex machines, such as engines..Machines affect work by applying one or more of the following principles:altering the amount of force applied in order to do the work;altering the amount of time over which the force is applied; and/oraltering the direction that the force is applied..A simple pulley, or a balanced lever, does not change the amount of force required to lift an object, or the time during which the force is applied, but they do change the direction of the force. A balanced lever (a teeter totter) makes it easier to lift another object (your friend on the other end of the teeter totter) because you can use your own weight to help lift that object (your friend). Such simple, balanced machines do not decrease the force, nor increase the amount of time during which the force is applied - they merely redirect the force, which is often helpful..Ramps, pulleys, and levers can also reduce the required force, in addition to changing the direction of the applied force, making the work easier in two ways. For example, a compound pulley reduces the amount of force required to lift a heavy object, but it now takes more time of that applied force to lift the weight. When this occurs, the machine does not actually change the amount of work done, but the machine makes it easier to do the same amount of work by spreading that work done over a longer period of time at a reduced force..Some machines use the opposite principle - they require more force than normal, but the force is applied over a reduced period of time. A catapult is an example of this principle - it is a lever in which more work is required to lift an object than without the catapult lever, but the object is lifted so quickly that, by the time the object is lifted, it is travelling fast enough to become a ballistic object.A machine affects work done by magnifying human's physical capabilities which reduces the intensity of the work.
Its just due to the "physical" definition of work. In order for a force to do work on an object it must move (at least some component of it) parallel to the force. So when lifting, the force is up and the movement is up and the force does work. In carrying, the force is up but the movement is horizontal. They are perpendicular and the force does no work. False
Increasing the number of pulleys divides the force required to lift up a heavy object; increasing the number of pulleys decreases the force needed by the person (or motor) pulling the first end of the pulley system. However, it is important to know that it does not affect the total work needed to lift up the object. As the force is decreased, the distance of rope needed increases to compensate for a conserved amount of work required for the load to be lifted.
Basically if the energy of the object has changed. For example if you lift something off the ground you have applied a force through a distance in the same direction as the force. By lifting the box you have given it gravitational potential energy (mgh). If you drop the box then gravity does work because the force of gravity will apply a force through a distance in the same direction. Just because there is force, doesn't mean work has been done. For example if you look at uniform circle motion even though there is a force, known as centripetal force, there is no work being done. This is because centripetal force is always perpendicular to velocity and only components of force parallel to the object can do work on it. We can tell no work has been done because the kinetic energy of the object remains the same (=1/2*m*v2).
Are you referring to the biological energy transformations involved in the body of a person actually lifting a box? Or are you referring to the act of imbuing an inanimate object with potential kinetic energy? If it is the latter; You are investing Potential Kinetic Energy in the box when you put it up on a shelf. If your body were 100% efficient, it should have expendeded as much energy in raising the box as the box then possesses. Because the box can fall, it will have the potential to transform its potential kinetic energy into actual kinetic energy, by virtue of its mass and velocity. It could do work, like falling on a lever which propelled a weight up a column and rang a bell on the top. If it is the former... I don't know.
Yes, work is done when you lift an object from the floor to a shelf. Work is the exertion of a force over a distance, and in this case, the force is applied to overcome gravity in lifting the object to a higher position.
The potential energy of the book on the shelf is equal to the work done to lift the book to the shelf. This is because the potential energy of an object at a certain height is equivalent to the work done against gravity to lift it to that height.
no
no, but the POTENTIAL energy may equal the work done to life the book to the shelf
false
The object gains potential energy when you do work to lift it. This potential energy is due to its position in the gravitational field.
The work done is calculated by multiplying the force applied by the distance over which the force is applied. In this case, the work done to lift the potted plant would be 25 Newtons * 1.5 meters = 37.5 Joules.
zach is amazing
The problem described involves lifting a bag of sugar to two different shelves consecutively. This can be approached using the concept of work done against gravity, where the work is calculated by multiplying the force needed to lift the bag by the vertical height it is lifted. By understanding the principle of work and energy, one can analyze the effort required to lift the bag to each shelf and the total work done in lifting it to both shelves.
The work done to lift the object is 200 J (Work = Force x Distance). The power exerted to lift the object is 40 watts (Power = Work / Time).
you have to put the lift on any floor then put another lift directly above the 1st one. If you want to skip a floor put the lift shaft in between the 2 lifts on the floor you want it never to stop on.
The work needed to lift the 50 kg weight to a 3 m high shelf is calculated as W = mgh, where m = mass (50 kg), g = acceleration due to gravity (9.8 m/s^2), and h = height (3 m). Plugging in the values gives W = 50 kg * 9.8 m/s^2 * 3 m = 1470 J. Therefore, 1470 Joules of work is needed to lift the weight.