## How long will it take a 2.5 kW motor to lift a 80 kg block 30 m high?

Motor will take 9.4 s to lift block. Work done by motor to lift block is equal to change in gravitational potential energy of block.

## How do you calculate the power needed to lift a load?

Let us calculate the work done in lifting an object of mass m through a height h. If the object is lifted straight up at constant speed, then the force needed to lift it is equal to its weight mg. The work done on the mass is then W = Fd = mgh.

## How do you calculate motor load speed?

For an AC motor, the number of poles and the frequency determine the no-load RPM.

…

At 60 Hz, a motor with two poles operates at 3,600 RPM with no load and about 3,450 RPM with a load:

- (Hz x 60 x 2) / number of poles = no-load RPM.
- (60 x 60 x 2) / 4.
- 7,200 / 2 = 3,600 RPM.

## How much force is needed to lift a 25 kg?

It is F = ma =mg =25kg•9.81m/s^2 = 245.25N. This is because you have to use a force equal to its weight at least( in Newton) to lift it up.

## How much energy does it take to lift 1kg 1m?

Lifting Weights:

On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter.

## How much can a motor push?

The maximum torque is given as 1.2 kg*cm (which includes the gearbox-transition), which means having wheels with an radius of 1 cm (or 2cm in diameter) will give you a force that is equivalent to 1.2 kg in weight at nominal voltage, as long as your electronics can provide a current of 300 mA (load current).

## How do I calculate torque?

A practical way to calculate the magnitude of the torque is to first determine the lever arm and then multiply it times the applied force. The lever arm is the perpendicular distance from the axis of rotation to the line of action of the force. and the magnitude of the torque is τ = N m.

## Which motor is used for lift?

AC slip ring or DC compound motors are prefer for lifts. Shunt type commutator motors are preferred in case of single phase installation. The latest lift designs use 3-phase induction motors with variable frequency drive electronic controls.

## How much force is needed to lift the 10Kg weight?

How much force is needed to lift the 10Kg weight? The correct answer is (B) 5 Kg. In a double-pulley system, the force is equal to the weight divided by two. It will require a 5 Kg force to lift a 10Kg weight.

## How much power is required to lift a 30 N?

The power needed is 3 watts.

## What is 120 in motor speed formula?

The equation for calculating synchronous speed is: S = 120 f/P speed = constant (120) times frequency of power source (60 Hz) divided by number of poles used in the motor (P).

## How do you calculate RPM on a 3 phase motor?

RPM = (120 * Frequency) / # of poles in the motor.

…

By formula:

- ((Synchronous Speed – Rated Full Load Speed) / (Synchronous Speed)) * 100% = Slip Rating.
- ((1800RPM-1750RPM) / 1800RPM) * 100%= (50RPM/ 1800RPM) * 100%
- (50RPM/ 1800RPM) * 100%= . 027 * 100%
- . 027 * 100% = 2.7%
- Slip Rating = 2.7%

## How much torque does a 1 hp motor have?

The 3600 RPM, 1HP motor produces 1.5 ft. lbs. of torque at 3600 RPM. So if your 1HP pump was operating at 1800 RPM, the 1800 RPM motor would be producing 3 ft.