Work And Energy Flashcards
1
Q
Grav vs Elastic Potential Energy
- which one corresponds to a spring
A
Grav: U = mgh
- includes pendulum
Elastic: U = 1/2kx^2
- x: displacement
- potential energy of a spring
2
Q
What is the simple equation for work?
A
Work = Fld cos theta
Also equals: delta: P*V
3
Q
Equation for Power:
A
Power: Fdcos theta / s
- also delta E/t
- rate at which work is done or energy is transferred
4
Q
Mechanical Advantage Formula:
A
Output F / input F
- at expense of distance: 2 D = 1/2 F
- Load and effort = 2D
5
Q
Efficiency of work equation:
A
Work out/work in = load* load distance / effort * effort distance
6
Q
Units of Torque
A
NMDA
7
Q
What forces do you need to account for when counter acting torque
A
Gravity and applied force down
8
Q
Attractive force in the nucleus
A
strong nuclear force
