work=mass x gravity x height that's the answer for part a
for part b about the power its just work/time therefore (mgh)/time is the answer for b
A lot
The frequency of the applied voltage is constant.
It depends on the motor used to run the clock.An electric motor can drive the second hand at constant velocities. A mechanical motor has a little pendulum in it. It swings back and forth once per second, and every time it swings it moves the second hand.
The two ways that friction is harmful is that it causes wear and tear of the parts and there is also causes abrasion on surfaces. However, frictions is also useful in various ways like braking when riding a bike and so on.In elevator systems, it is harmful to motor and machine bearings, causes wear. on elevator rails that elevator rides on ,the guide shoes wear and need constant lubrication, unless they use more modern roller guides.
a pump is driven by the engine of the machine and is linked to the speed set by the operator. It pumps a constant stream of high-pressure oil to the motor. Since the motor is linked to the drive wheels or tracks of the machine, it gives the machine its travel speed.
Speed of...? It depends on the context. Natural constant speeds include those of light (and all electromagnetic radiation) in vacuo; also that of electricity along a conductor. The average speeds of sound in air and water are taken as constants in acoustics. You may also need specific constant speeds of say, an electric motor or generator.
no,elevetor motor depends on size of elevetor & how many persons are accomodate in elevetor.
The Synchronous motors will operate at a constant speed from noload to fullload. Even it is classified as an AC motor, we have to fed the motor both AC and DC supplies. That we have to supply DC to the Field (Normally Rotor) and AC to the Armature (Normally Stator).
Dc shunt motor is constant speed motor.Its speed is constant with armature current.This shunt motor is used in paper mills and drilling machines
yes the motor will run but will draw more current and the torque will be not constant means not smooth due to unbalanced current
Dc shunt motor is constant speed motor.Its speed is constant with armature current.This shunt motor is used in paper mills and drilling machines
The phase voltage is usually constant and determined by the supply voltage.
just connect the supply of motor to power supply..and run..then ovserve the motor sounds,temperature and vibration.
Passenger elevators are big pulleys powered by a motor with 6-8 cables or more that pull the elevator cab or the counter weight letting the elevator go up or down.
An elevator pit typically contains the elevator buffer, which absorbs energy in case of a sudden stop or free fall, the counterweights, and the guide rails that ensure the elevator cab moves smoothly. Additionally, it may also house the hydraulic equipment or motor that powers the elevator.
The the supply stays within +/- 5% of what the motor is rated for, you can do this.
If the motor is connected to an ungrounded delta supply service there will be no effect on the operation of the motor. If the motor is connected to a wye system supply service and the B phase grounds out, the motor's overload protection would take the motor off line from the electrical supply.
The heating time constant is the time that an induction motor takes to reach it's operational temperature.