# Solve Energy Needed to Raise 2000kg Lift to 10m

• kabton14
In summary, the formula for calculating energy needed to raise a lift is E = mgh, where E represents energy in joules, m represents the mass of the lift in kilograms, g represents the gravitational acceleration (9.8 m/s^2), and h represents the height the lift is being raised to in meters. The mass of the lift in kilograms can vary but can range from 100 kilograms for a small personal lift to over 2000 kilograms for a large commercial lift. The height the lift needs to be raised to is 10 meters in this specific scenario, but it can vary depending on the specific needs and purpose of the lift. The value of gravitational acceleration is approximately 9.8 meters per second squared, and the
kabton14

## Homework Statement

A engine used to raise a lift is 60% efficient, and the lift's mass is 2000kg. How much energy would be needed to raise it to 10m?

## Homework Equations

Efficiency = energy output/ energy input *100

## The Attempt at a Solution

EP=mgh = 2000*9.8*10= 196000 J.

Therefore, eff. = energy output/energy input *100 = (0.6=EOUT/196000

EOUT= 0.6*196000=117600 J

Am I on the right track?

Hi kabton14, welcome to PF.
Here Eout = mgh.

Yes, your approach and calculations are correct. The final answer of 117600 J is the amount of energy needed to raise the lift to 10m, taking into account the efficiency of the engine.

## What is the formula for calculating energy needed to raise a lift?

The formula for calculating energy needed to raise a lift is E = mgh, where E represents energy in joules, m represents the mass of the lift in kilograms, g represents the gravitational acceleration (9.8 m/s^2), and h represents the height the lift is being raised to in meters.

## What is the mass of the lift in kilograms?

The mass of the lift in kilograms can vary depending on the type and size of the lift. For example, a small personal lift may have a mass of around 100 kilograms, while a large commercial lift may have a mass of over 2000 kilograms.

## What is the height the lift needs to be raised to?

In this specific scenario, the height the lift needs to be raised to is 10 meters. However, the height may vary depending on the specific needs and purpose of the lift.

## What is the value of gravitational acceleration?

The value of gravitational acceleration is approximately 9.8 meters per second squared. This value is considered a standard for most calculations and may vary slightly depending on location and elevation.

## What is the unit for energy in this calculation?

The unit for energy in this calculation is joules (J). Other common units for energy include kilojoules (kJ) and watt-hours (Wh).

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