Recent content by swerider

  1. S

    Kinematics car acceleration question

    The deceleration (negative acceleration because it is slowing down) is the same in both cases because it is assumed that the same braking effort was used in both cases. Remember accel/decel is the rate of change of velocity, and in both cases the car is slowing down at the same rate, regardless...
  2. S

    Determining Force for Stopping Angular Motion in Rotating Body

    Impulse is the force over time. How would I get the angular momentum? not sure of the formula thanks
  3. S

    Determining Force for Stopping Angular Motion in Rotating Body

    Well if the wheelbase is 1.4m, take the CG to be in the middle so lever arm will be 0.7m. Stopping time is difficult to estimate but I would say about 0.3s. Is it a simple impulse equation?
  4. S

    Determining Force for Stopping Angular Motion in Rotating Body

    Thanks cragar but that doesn't actually help me. I need the force resulting from the angular momentum. During a wheelie all the weight is on the back wheel anyway so putting it on a scale wouldn't tell me anything.
  5. S

    Determining Force for Stopping Angular Motion in Rotating Body

    Hello I am busy with a design project and need some help determining the force that can be exerted by a rotating body at its center of gravity. Picture a motorcycle performing a wheelie, the center of gravity rotates about the rear axle. Given that the mass and angular acceleration are known...
  6. S

    Calculating angular acceleration and translating to force

    Hi there I need some help in calculating the force created by angular motion. I am designing a wheelie bar for my motorcycle and need to know what force the design must be able to handle. I have attached a simple sketch of the design. Taking into account; torque produced by the engine...
  7. S

    Why Does Airflow Decrease When Blowing Directly Into a Pipe?

    if you use your mouth to blow air through a pipe (an A4 page rolled into a pipe for simplicity) with your mouth against the pipe, the outlet flow is much less compared to when you blow through the pipe with your mouth away from it. In terms of fluid mechanics, why does this happen?
Back
Top