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PHYSICS

JAMB 2005 - Question 49

Physics 2005 JAMB Past Questions - Question 49: a body of mass 36kg falls through a viscous fluid which offers a drag force of 260n on the body .the upthrust on the body at terminal velocity is

Choose the correct answers from the options given.

a body of mass 36kg falls through a viscous fluid which offers a drag force of 260n on the body .the upthrust on the body at terminal velocity is

A: 310n

B: 50n

C: 620n

D: 100n

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Correct Answer

Explanation

for anybody falling through a viscous liquid, at its terminal velocity, the resultant force acting on it is zero from the equation: Mg - V - U =0. where V = viscous dragU = up thrustMg = weight of the body.therefore 36x10-260 - U = 0therefore U = 360 - 260 =100N