ns Comments - Answer Overflow

Topics

ns

•Created by ns on 3/31/2025 in #💭│doubts

Basic: NLM ground frame doubt

+solved @Aetherfly

34 replies

•Created by ns on 3/31/2025 in #💭│doubts

Basic: NLM ground frame doubt

thank you so much!

34 replies

•Created by ns on 3/31/2025 in #💭│doubts

Basic: NLM ground frame doubt

@Aetherfly got it.

34 replies

•Created by ns on 3/31/2025 in #💭│doubts

Basic: NLM ground frame doubt

so i wanted to learn

34 replies

•Created by ns on 3/31/2025 in #💭│doubts

Basic: NLM ground frame doubt

like im not very comfortable with doing from ground frame in such qs

34 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

yeah

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

yeah but they'll be equal if we consider the frame to be moving

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

yeah

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

this is in the other frame of ref

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

okay maybe this will help. ext force like you pointed out earlier is kx. kx= -mudu/dx you can integrate it from 0 to x0 where x0 is the maximum extension. the limits for velcoity of the block will be from u to 0. so this gives us 1/2kx0^2= 1/2mu^2

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

the force is still there cuz that doesnt depend upon ref frames. but we dont account for it since we see the spring at rest. the change in the ref frame has simplified the problem so using energy conservation isnt really a problem. your doubts are really good. i know this may not be a convincing explanation but yeah.

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

No description

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

and then applying energy conservation

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

they've solved it by using another ref frame

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

i'll just send the soln

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

wait a min

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

i saw a similar q in physics galaxy

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

another way to think about it is imagine you're in a ref frame that moves with u in the same direction. you'll see the spring at rest. and you'll see the block moving

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

we're not conserving energy. we're just using the condition for maximum extension

84 replies

•Created by Aetherfly on 3/29/2025 in #💭│doubts

work done by external agent?

it's the condition for maximum extension

84 replies