Xiah
Newbie level 3
- Joined
- May 6, 2011
- Messages
- 4
- Helped
- 0
- Reputation
- 0
- Reaction score
- 0
- Trophy points
- 1,281
- Location
- Newcastle
- Activity points
- 1,308
Hi guys i'm pretty new here and i'm just looking for abit of help really. I'm attempting my physics assignment and i can't for the world of me figure out how to work this one out and searching online for equations is just making it more confusing for me! The question is below.
A 4700 uF capacitor is charged to a p.d. of 10v. When the capacitor is discharged through a small electric motor, the motor lifts a weight of 0.1N through a height of 0.12m.
I need to work out the energy stored in the charged capacitor - I've done this one I think! E = 1/2 CV^2 which is 1/2 * 4700 * 100
The gravitational potential energy gained by the weight
The efficiency of the energy transfer - This one i think i can do!
Any help at all would be greatly appreciated so thanks in advance!!
A 4700 uF capacitor is charged to a p.d. of 10v. When the capacitor is discharged through a small electric motor, the motor lifts a weight of 0.1N through a height of 0.12m.
I need to work out the energy stored in the charged capacitor - I've done this one I think! E = 1/2 CV^2 which is 1/2 * 4700 * 100
The gravitational potential energy gained by the weight
The efficiency of the energy transfer - This one i think i can do!
Any help at all would be greatly appreciated so thanks in advance!!
Last edited: