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  1. J

    Equation for drag force

    Thanks for your reply. But it was like a bonus question kind of thing, why 1/4 AV^2 instead of the other equation, he said the 1/4 will work for any speed less than speed of sound and uses normal air and something. And he said 1/4 is not the error that # is precise, so the problems got to be in...
  2. J

    Equation for drag force

    I know that standard formula is, FD = 1/2 CD *ApV^2 FD = Drag Force. SI: N CD = Drag Coefficient. SI: Dimensionless (Typical Values) A = Coss-sectional Area perpendicular to the flow. SI: m2 r = Density of the medium. SI: kg/m3 v = Velocity of the body relative to the medium. SI: m/s...
  3. J

    Equation for drag force

    Homework Statement I know that standard formula is, FD = 1/2 CD *ApV^2 FD = Drag Force. SI: N CD = Drag Coefficient. SI: Dimensionless (Typical Values) A = Coss-sectional Area perpendicular to the flow. SI: m2 r = Density of the medium. SI: kg/m3 v = Velocity of the body relative...
  4. J

    Newtons third law problem

    Thanks for your help
  5. J

    Newtons third law problem

    Homework Statement Two boxes are in contact with each other, both different mases, and are both being pulled by an external force, F. M1M2--------->F I can calculate the acceleration of the system but the Question asks to calculate the force between the mases, ie newtons third law. If...
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