- #1
BizzPhizz
- 14
- 0
Im SOOOO Confused.
Im studying Work, Energy and Society and I'm really darn confused.
I have the highest mark in the course, and If I'm confused, I'm wondering how others are feeling.
Whenever I have multiple questions, and they may sound stupid but please help me out:
1. Does Fg do work? I never understand when Fg does work when it doesn't. Please help me understand if Fg does work, and if it does, when.
2. I don't understand what my teacher meant when he said "For each conservative force there is a form of energy associated with it. Therefore we never calculate energy done by conservative forces"
3. When I solve problems, I'm never sure when I need to set directions as positive or negative, or when I need to rely on Cosθ (Ex: Work=FxDistancexCosθ) but when you work with energy, if something moves up its + when something moves down its -?
4. Is gravitational potential energy is equal to the work done by the force that would lift hte object to that height? Yes or no?
5. Is Gravitational potential energy the work done by Fg? I thought Fg does no work :/
PLEASE Help me.
Thanks,
BizzPhizz
Im studying Work, Energy and Society and I'm really darn confused.
I have the highest mark in the course, and If I'm confused, I'm wondering how others are feeling.
Whenever I have multiple questions, and they may sound stupid but please help me out:
1. Does Fg do work? I never understand when Fg does work when it doesn't. Please help me understand if Fg does work, and if it does, when.
2. I don't understand what my teacher meant when he said "For each conservative force there is a form of energy associated with it. Therefore we never calculate energy done by conservative forces"
3. When I solve problems, I'm never sure when I need to set directions as positive or negative, or when I need to rely on Cosθ (Ex: Work=FxDistancexCosθ) but when you work with energy, if something moves up its + when something moves down its -?
4. Is gravitational potential energy is equal to the work done by the force that would lift hte object to that height? Yes or no?
5. Is Gravitational potential energy the work done by Fg? I thought Fg does no work :/
PLEASE Help me.
Thanks,
BizzPhizz