Explaining the Energy Transfer in a Chairlift's Start and Stop

In summary, when a fully loaded chairlift starts, it requires more energy due to the initial inertia and resistance to change. This energy is transferred to the riders in the form of gravitational potential energy, which is then converted to kinetic energy on the way back down the hill. Once the lift is running at constant speed, it continues to transfer energy to the riders in the form of gravitational potential energy at a rate dependent on the speed.
  • #1
Kennedy111
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Homework Statement


Propose an explanation for the following fact. Include a description of the energy transfers that would take place when the lift starts and stops.

A fully loaded chairlift requires more energy to start then it does to maintain motion.

The Attempt at a Solution


I thought that perhaps it takes more energy in the beginning because the chairlift has inertia and is resisting the change. You need to apply more energy to get over this initial inertia.

I'm having a hard time including energy transfers...

I know that when the lift starts riders gain gravitational potential energy, which eventually turns into kinetic energy on the way back down the hill..

Thank you !
 
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  • #2
When it's running at constant speed it's giving mass additional PE at a rate that depends on the speed.

But it has to get to that speed first so...
 

What is the purpose of a chairlift?

The purpose of a chairlift is to transport skiers and snowboarders up a mountain. It allows them to access higher elevation and more challenging terrain without having to hike or climb.

How does a chairlift work?

A chairlift uses a continuous cable system that is powered by an electric motor. The cable runs between two terminals, with chairs attached at regular intervals. The motor rotates the cable, pulling the chairs along the designated path.

What type of energy is involved in the chairlift's operation?

The chairlift primarily uses mechanical and electrical energy. The motor converts electrical energy into mechanical energy to rotate the cable and move the chairs. Additionally, gravitational potential energy is involved as the chairs are lifted to higher elevations.

How does energy transfer occur in a chairlift?

Energy transfer in a chairlift occurs in several ways. The motor converts electrical energy into mechanical energy to rotate the cable and move the chairs. As the chairs are pulled up the mountain, their potential energy increases and their kinetic energy decreases. Friction between the moving parts also results in some energy transfer from mechanical to heat energy.

What are some safety measures in place to prevent energy-related accidents on chairlifts?

Chairlifts are equipped with safety features such as anti-rollbacks and safety bars to prevent accidents. Regular maintenance and inspections of the motor and cable are also essential to ensure the safe operation of the chairlift. Additionally, emergency braking systems are in place to stop the lift in case of power outages or other emergencies.

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