Question
A piece of wood is taken deep inside a long column of water and released. It will move up(a) with a constant upward acceleration.(b) with a decreasing upward acceleration.(c) with a deceleration.(d) with a uniform velocity.
Step 1
When the wood is submerged in water, two main forces act on it: the buoyant force (upward) and the gravitational force (downward). Show more…
Show all steps
Your feedback will help us improve your experience
Vivek Singh and 74 other educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
A steel ball is placd on the surface of water in a deep tank. Water exerts a resistive force proportional to the velocity of the body through it. The steel ball, then released starts falling under the earth's gravitational force. The steel ball sinks into the water (a) with constant acceleration equal to gravitational acceleration (b) with constant acceleration less than gravitational acceleration (c) with decreasing acceleration and finally attaining a constant velocity (d) with acceleration decreasing till gravitational force equals the resistive force when the ball attains equilibrium
Solids and Fluids
Section B
In a college physics lab experiment, a piece of balsa wood is completely submerged under the water. The wood is tethered by string to the bottom of a container of water. The balsa wood has a volume of 1.34x10^-6 m^3 and a density of 0.16x10^3 kg/m^3. On the other hand, water has a density of 1.00x10^3 kg/m^3. Answer the following questions and show all work and reasoning: (a) If the string is cut, then what is the magnitude a of the upward acceleration before the wood gets to the surface? (b) Once it gets to the surface, it will come to rest and sit in equilibrium. This condition is called floating. Show that 16 percent of the wood's volume is below the surface of the water. That 16 percent is shown as the darkened section under the water. HINT: For your convenience, the dark section of the block shows the section under water which displaces the fluid. Find the weight of the water displaced by the section under the water. The weight of water displaced must be equal to the weight of the entire piece of wood. In turn, the weight of the entire piece of wood must be equal to the product of the given wood density and the given wood volume.
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD