Recent content by Crebble32

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    Calculating Maximum Elevation of Top Ball After Collision

    Thank you for your help!
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    Find Initial Angle to Hit Target 100m Away with Rifle at 30deg Angle

    Thank you so much for your help! I think I finally got it :)
  3. C

    Calculate Velocity of Skydiver: Mass M, Air Drag Coefficient D

    Thank you so much!
  4. C

    Find Initial Angle to Hit Target 100m Away with Rifle at 30deg Angle

    I am just working in circles... just come up with the values I'm already given. I don't understand what formulas to use...
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    Calculating Maximum Elevation of Top Ball After Collision

    Homework Statement Two balls fall one above the other from height h= 5m. The bottom one has m= .1kg and the top one has m= .01kg. What will be the maximum elevation of the TOP ball after the balls hit the floor? Assume that collisions with the floor and between the balls are elastic...
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    Calculate Velocity of Skydiver: Mass M, Air Drag Coefficient D

    Calculate velocity of the skydiver of mass M= 80kg as a function of time. The air drag coefficient D= 100g/m = 0.1kg/m. Assume that the skydiver has v=o at t=0. In my book high speed air drag is f=Dv^2. I found Vt= 88.5 m/s with Sqrt(mg/D). BUT this is not the V they are asking for :(...
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    Find Initial Angle to Hit Target 100m Away with Rifle at 30deg Angle

    A rifle fires a bullet at 300 m/s at a target that is up on a wall 100 m away. The rifle's line of sight creates a 30 degree angle with the horizon. What initial angle does the rifle need to be directed to hit the target? The formulas I thought I needed are: Vy=ViSIN(30) Here my Vi is...