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The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:
  • a)
    4.23 × 10− 6 N
  • b)
    8.48 × 10−3 N
  • c)
    8.48 × 10−5 N
  • d)
    4.23 × 10−3 N
Correct answer is option 'B'. Can you explain this answer?
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To calculate the viscous drag force, we can use the formula:

Drag force = 6πηrv

Where:
η = viscosity of the oil
r = radius of the copper ball
v = terminal velocity of the ball

Given:
η = 0.9 kg m^-1 s^-1
r = 5 mm = 0.005 m
v = 10 cm s^-1 = 0.1 m s^-1

Substituting the values into the formula, we get:

Drag force = 6π(0.9)(0.005)(0.1)

Calculating this expression, we find that the viscous drag force is approximately 0.0085 N, which can be rounded to 0.008 N.
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The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:a)4.23 × 10− 6 Nb)8.48 × 10−3 Nc)8.48 × 10−5 Nd)4.23 × 10−3 NCorrect answer is option 'B'. Can you explain this answer?
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The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:a)4.23 × 10− 6 Nb)8.48 × 10−3 Nc)8.48 × 10−5 Nd)4.23 × 10−3 NCorrect answer is option 'B'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:a)4.23 × 10− 6 Nb)8.48 × 10−3 Nc)8.48 × 10−5 Nd)4.23 × 10−3 NCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The terminal velocity of a copper ball of radius 5 mm falling through a tank of oil at room temperature is 10 cm s-1. If the viscosity of oil at room temperature is 0.9 kg m-1 s-1, the viscous drag force is:a)4.23 × 10− 6 Nb)8.48 × 10−3 Nc)8.48 × 10−5 Nd)4.23 × 10−3 NCorrect answer is option 'B'. Can you explain this answer?.
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