Equations and important concepts

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  1. Sin (0)
  2. Sin(30)
  3. Sin(45)
  4. Sin(60)
  5. Sin(90)
  6. Cos(0)
  7. Cos(30)
  8. Cos(45)
  9. Cos(60)
  10. Cos(90)
    • Sin (θ)= O/H
    • Cos (θ)= A/H
    • Tan (θ)= O/A
  12. Force m*a
    • Mass*acceleration
    • Kg*m/s²
  13. Joules derivation-using work formula
    • W=F*d
    • J=N*m
    • J=(Kg*m/s²)*m
    • J=Kg*m²/s²
  14. Joules derivation-using Energy formula
    • KE=1/2mv²
    • J=Kg(m/s)²
    • J=Kg*m²/s²
  15. PE:mgh
    • J=Kg(m/s²)m
    • J=Kg*m²/s²
  16. Watts derivation-using the power formula
    • P=W/T Power=Work/Time
    • W=J/s
    • W=N*m/s
    • W=(Kg*m/s²)(m/s)
    • W=Kg(m²/s²)
  17. Vector
    Magnitude + direction
  18. Scalar
    Magnitude ONLY
  19. Displacement vs distance
    • Displacement is how far you are from where you started in a straight line path,while distance is the total steps you took to get there regardless of the path.
    • Displacement is a vector
    • Distance is a scalar
  20. Velocity
    • V=∆d/∆t
    • Velocity equals the change in distance over time
    • m/s
  21. ****Note: Velocity includes both magnitude and direction, speed is only the magnitude
  22. Acceleration
    • a=∆V/T
    • Acceleration equals the change in velocity over time
    • m/s²
  23. ****Note: Since acceleration is proportional to Velocity, when velocity changes EITHER IN MAGNITUDE OR DIRECTION, acceleration changes!
  24. @Rest=no acceleration
    Constant velocity=no acceleration
  25. Gravity 10(m/s)/s
    • *Every second your velocity changes by 10m/s
    • -Sec 0= 0m/s
    • -Sec 1= 10m/s
    • -Sec 2= 20m/s
  26. When is g positive or negative in a problem?
    Consider the three variables: Acceleration (a), Velocity (V) and Displacement (d)
  27. *if all three point in the same direction, then it doesnt matter, they can all be + or -
    *If one of them points in a different direction, then you have to pick a point of reference and stick to it.
  28. Which equation can be use when there is NO a? d=vt
  29. Which set of equations is available when there is a?
    • d=(Vavg)(t)
    • d= Vi*t + (1/2)at²
    • Vf²=Vi² + 2ad
    • Vf= Vi + at
    •  or     *When Vi=0
  30. d=(Vavg)(t)
  31. d= Vi*t + (1/2)at²
  32. Vf²=Vi² + 2ad
  33. Vf= Vi + at
  34. In the graph of Displacement vs Time, what does the slope mean? Does the area under the curve have any meaning?
    • The slope is Velocity
    • No, the area under the curve is useless
  35. In the graph of Velocity vs Time, what does the slope mean? Does the are under the curve have any meaning?
    • The slope is acceleration
    • Yes, the area under the curve is displacement
  36. What's Newton's first law?
    , then velocity is constant

    *A body in motion will stay in motion if no there is no net force being applied on the body. Or a body at rest will stay at rest unless there is a net force being applied on the body
  37. What's Newton's second law?

  38. What's Newton's Third Law?

    Every force has an equal and opposite force

Card Set Information

Equations and important concepts
2014-05-07 06:14:38
MCAT physics Chad

Equations and Important concepts Chad's videos All Physics' days
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