Question Detail

PHY 101 PHY 101 Past Questions Objective Question
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Question

A piece of wood with a density of 706 kg/m³ is tied with a string to the bottom of a water-filled flask. The wood is completely immersed and has a volume of 8.00 × 10^-6 m³. What is the tension in the string?
Options
A 0.043 N
B 0.023 N
Correct Answer
C 0.321 N
D 0.032 N
Correct Answer

Option B is the correct answer.

Detailed Explanation

Buoyant force = ρwater Vg = 1000×8×10⁻⁶×9.8 = 0.0784 N. Weight = 706×8×10⁻⁶×9.8 = 0.0553 N. Tension = Buoyant − Weight = 0.023 N.

Hint

Since it is tied down, tension balances the excess buoyant force.

Question Info

Course: PHY 101
Topic: PHY 101 Past Questions
Type: Objective
Difficulty: Not specified
Question 141 of 1250
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