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WAEC Physics 2012 Paper
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© africaexams.com
Question : 5
Total: 47
A metal ball of weight W falls through a column of glycerine of viscosity V. If the ball experiences an upthrust U and terminal velocity is attained, then
W > U + V
W = U + V
W = U - V
W < U + V
Validate
Solution:
When terminal velocity is attained, The equation of motion becomes
mg - V - U = 0
∴
mg = W = U + V
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