{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Problem 1.7 - Problem 1.7 Given[Difficulty 3 Small particle...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Problem 1.7 [Difficulty: 3] Given: Small particle accelerating from rest in a fluid. Net weight is W, resisting force F D = kV, where V is speed. Find: Time required to reach 95 percent of terminal speed, V t . Solution: Consider the particle to be a system. Apply Newton's second law. Basic equation: F y = ma y Assumptions: 1. W is net weight 2. Resisting force acts opposite to V Then F y y = = = W kV = ma dt m dV W g dV dt or dV dt g(1 k W V) = Separating variables, dV
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}