How Do You Calculate Work and Potential Energy in Physics Problems?

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    Grade 11
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Homework Help Overview

The discussion revolves around calculating work and potential energy in physics problems, specifically involving a case being lifted and an archer drawing an arrow. Participants express confusion regarding the application of formulas and concepts related to work and energy.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning

Approaches and Questions Raised

  • Participants discuss the formula for work done (w = f x d) and question its application in different contexts. There is an exploration of the relationship between force, displacement, and energy stored in a system.

Discussion Status

Some participants have offered guidance on the definition of work and the variables involved. There is an ongoing exploration of the correct application of formulas and the distinction between different forces in the context of potential energy.

Contextual Notes

The original poster expresses a lack of understanding and requests full solutions, indicating a need for clarification on the concepts discussed. There is also a mention of previous learning on the topic, suggesting some familiarity but current confusion.

hassanaw
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A 175 kg case must be loaded onto a truck that is 1.5m above the ground.
calculate work done

AND

An archer exerts a force of 100N as she draws the arrow back 0.60m.
what is the potential energy of the system before the string is released?
iam completely lost on these 2 questions we did this unit like a month ago, can somebody please help with full proper solutions?

thanks
tries:

w=fxd
=9.8x36
=353 Jfor question 2, i did
the Newtons =f
so = fxd
= answer

right formula?
 
Last edited:
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do you know how to calculate the work done by a constant force?
 
Start with the definition of work done. What variables are in it?
 
w = f x d

f= m x a
force is mass times acceleration

d is displacement
 
right, w = f x d. but be careful, if you are talking about the energy stored in the string, f needs to be the force of the string (not the person pulling it).

next, you need to know the relationship between potential energy and work.
 

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