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secondary 3 | Biology
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Matthew
Matthew

secondary 3 chevron_right Biology chevron_right Singapore

I dont get this qurstion part a ii. For the MGH, why is the the length MB taken as the H and not PB when the height of the string is 0.120. PS: Iknow I put Biology but the description of the app says it supports physics too and i cant find the physics option

Date Posted: 2 months ago
Views: 34
snell
Snell
2 months ago
to ans ur qn for part (a),
u r considering energy change from position A to position B, not from P to B.
hence, the h value in mgh is from A to B, but Only consider the vertical height change, i.e. MB, not AB, and of cuz not PB.

hope this ans ur qn.

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Arnold K H Tan
Arnold K H Tan's answer
735 answers (A Helpful Person)
1st
You must consider the vertical height difference between the starting point of the object at A, and the ending point at B.