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Unformatted text preview: The screw has a lead (advancement per revolution), L , of 1.25 in/rev and a distance, b , to the center of the ball A of 6 in. The screen turns at a constant rate of 4 rev/sec. Calculate the magnitudes of the velocity and acceleration of the center of the ball. Hint the velocity of advance of the ball can be found by taking into account the helix angle, γ , by the equation: γ cos / v v = where the helix angle may be found from: ( 29 b L π 2 / tan = 1 3. 4. 2 5. 3 6. 7. 4 8. 9. If the velocity x of block A up the incline is increasing at a rate of 0.044 m/s each second, determine the acceleration of B. 5...
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 Spring '08
 CORRADOPOLI
 Derivative, Acceleration, Velocity, constant rate

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