Question

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U Question 5 3 pts Abrick with a mass of 50 kg and a volume of 0.04 mois submerged in a fluid that has a density of 900 kg/m2. The brick will sink in the fluid. O True O False Question 6 5 pts A marble with a mass of 0.05 kg and a volume of 2.00 x 10"mis dropped in a glass of alcohol, which sinks to the bottom of the glass. If alcohol has a density of 789 kg/m2, what is the magnitude of the buoyant force in newtons? Round to the nearest hundredth (0.01) Question 7 7 pts A marble with a mass of 50 g and a volume of 1.50x 10m is dropped in a glass of alcohol, which sinks to the bottom of the glass. If alcohol has a density of 789 kg/m what is the marble's acceleration as it sinks in m/s2 Hint: Remember Newton's 2nd Law!

Answer 1

This problem can be solved using Archimedes' principle and Newton's second law of motion. For Question 5, the answer is true. For question 6, the answer is 0.15N. For question 7, the answer is 7.48 m/s^2. Detailed solution given below. Ask me if you have any doubts. Feedback will be helpful.


= 789 kg/m3 m=sog = 0.05 kg (1kg= 1000 g) (like in question 6) Volume V= 1.50 x 10-5 m3 Hince, Foz upg = 1.50 x 105 X 789 x 9.8 N JU 0115 98 N Fg = mg 0.05 X 9.8 N 0.49 N so a= Fg - FB 0.49 0.11598 mis? ( m 0.05 a=7.48 m 142 Hene, the marble's acceleration as it 7.48 m/s2 sinks is 2