Drag force Definition and 159 Threads

  1. D

    Proving Constant Horizontal Velocity for Particle w/ Drag Force

    Prove this... A particle of mass m is traveling along the x-axis with a constant horizontal velocity v0i. When the particle passes through the origin, it experiences a Drag Force which is proportional to the square of the particle's speed (F[SIZE="1"]d = - b/v^2i... drag coefficient b...
  2. P

    Drag Force Equation Useless in Finding Terminal Velocity

    As most of you know, the drag force equation is Fd=1/2*p*Cd*V^2*Cd*Ac. At terminal velocity, Fd equals weight. If you find the value of all the variables except Cd and V, you still won't have anything. But the terminal velocity equation is Vt= sqrrt of 2weight/p*Cd*Ac. So if V is terminal...
  3. M

    Drag force equation, projectile

    Hello everyone. I have researched from the internet that the drag force equation for projectile motion is either F= C p a v^2 or F= 0.5 C p a v^2. Which one is the correct one? The initial speed I am dealing with is about 20m/s. And what's the value for C for a normal tennis ball. Other sites...
  4. M

    How Does Drag Force Relate to Newton's Laws of Motion?

    Hello, please help me I have a question regarding drag force and Newton's law of motion. This is quotes from online pdf files from University of Toronto Scarborough. "the terminal velocity is F/b , where b is drag constant Let’s solve the equation of motion and see how this is reflected...
  5. T

    Find Force F(v) of Boat Drag Force: Barger's Classical Mechanics

    I have a question about a physics problem, this comes from Barger's Classical Mechanics: A boat is slowed by a drag force, F(v) and its velocity decreases according to the formula v=c^2(t-t_{1})^2 where c is a constant and t_{1} is the time at which it stops. Find the force F(v) as a function...
  6. B

    Solve Drag Force Questions for Sky Diver of Mass 80.0kg

    Can anyone Please help me on this. I am totally stuck at this question . thanks... ...A sky diver of mass 80.0 (including parachute) jumps off a plane and begins her descent. Throughout this problem use 9.80 for the magnitude of the acceleration due to gravity. Q1. At the...
  7. A

    Calculating Drag Force Constant in a Simple Physics Problem

    The first part of a pretty involved, 8 part question on modelling drag force states: "A 0.142 kg ball has a terminal speed of 42.5 m/s. If a ball experiences a drag force of R=CV^2, what is the value of the constant, C? I know this is a ridiculusly easy problem, but our text doesn't cover...
  8. U

    What Does the Constant 'b' Represent in the Drag Force Equation?

    free fall with drag force If the equation F=-bv^2 describes the drag force of an object...then the differential equation for the object's motion would be: dv/dt= -g+bv/m or is it... dv/dt= g-bv/m After solving the equation, should I get... V=mg/b[1-e^(-bt/m)] Also, does this...
  9. T

    Turbulent Drag Force: Relationship for A, v & p

    Can anyone give me a relationship for the turbulent drag force on an object with a cross sectional area A and a speed v in a medium with density p please? Thanks
Back
Top