shaheryar9
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Need help with the explanation part of this question
A group of friends go sliding down a water slide seperately, they sit on a sled and go down the slide.
The decrease in gravitational potential energy of one rider on the slide was7.66kJ, the rider moved through a verticle height of 16.0M with a gravitational field of 9.8 N/Kg

at the bottom of the slide, all the friends and their sleds have approximately the same speed. why? (4 Marks)
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ineedhelpp101
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(Original post by shaheryar9)
Need help with the explanation part of this question
A group of friends go sliding down a water slide seperately, they sit on a sled and go down the slide.
The decrease in gravitational potential energy of one rider on the slide was7.66kJ, the rider moved through a verticle height of 16.0M with a gravitational field of 9.8 N/Kg

at the bottom of the slide, all the friends and their sleds have approximately the same speed. why? (4 Marks)
omg i had this in my physics exam a few weeks ago, i literally had no clue what to write
sorry lol
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hijabibubbles
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I need help with this too! Does someone know how to answer this?
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hijabibubbles
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bumppp
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Hiim
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Damn this is hard. Maybe you have to talk about the energy transfers? It changes from gravitational potential to kinetic potential, so because the height they travel down is the same, the speed would also be the same. They question mentions numbers so I guess we’re also going to have to do a calculation.
This ones got me stumped...
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pprana16
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I might be wrong but is it to do with the fact that their total weight balances with the air resistance/friction they experience (initially they were accelerating because weight was larger than air resistance), so their terminal speed is the same. It seems like a reasonable answer...
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Hiim
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(New and improved answer)
You could say
They all have the same speed because they travel the same distance as the height of the slide is 16M. There is no friction as the slide is a water slide and water acts as a lubricant, so they aren’t affected by friction. At the top of the slide the gravitational energy is acting on them, but as they move the energy transfers to the stored kinetic energy, so the energy is from the kinetic energy store aswell. As they reach the end they reach their maximum kinetic potential.
I might just be waffling but this is the best answer I got.
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cixato
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as it's the same slide for every rider, the slide is the same height for every rider which means they must have the same amount of gravitational potential energy store. this means when they are released, they will travel down the slide at different rates due to their differences in mass but the maximum kinetic energy will be the same as the gravitational potenital energy store at the start of the slide so all riders can only reach a maximum speed. hope this helps
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