1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
swat32
3 years ago
5

8. A 40.0kg block of metal is suspended from a scale and is immersed in water. The dimensions of the block are 12.0cm x 10.0cm x

10.0cm. The 12.0cm dimension is vertical, and the top of the block is 5.00cm below the surface of the water. (a) What are the forces exerted by the water on the top and bottom of the block? (Take P0 = 1.0130 X 105 N/m2 .) (b) What is the reading of the spring scale? (c) Show that the buoyant force equals the difference between the forces at the top and bottom of the block.
Physics
1 answer:
Alja [10]3 years ago
5 0

Answer:

a.1017.9N

b.1029.7N

c.T=380.6N

d.11.8 N

Explanation:

(a) The absolute pressure at the level of the top of the block is

Po=atmospheric pressure

g=gravity

h1=height

rh0=density of water

P1=Po+rho*g*h1

1.013*10^5+1000(9.81)(0.05)

1.0179*10^5Pa

at the level of the bottom of the block we have

P2=Po+rho*g*h2

1.013*10^5+1000(9.81)(0.17)

1.0297* 10^5 Pa

the downward force exerted on the top by the water is

Ftop=P*A== × = 1.0179* 10^5* 0.100

= 1017.9 N

and the upward force the water exerts on the bottom of the block , which is the buoyant force

Fbot== × = 1.0297 10^5 * 0.100 m

= 1029.7 N

(b) The scale reading is the tension, T, in the cord supporting the block.

if the block is at equilibrium, then sum of vertical forces

EFy=T+Fbot-Ftop-mg=0

T=mg+Ftop-Fbot

T=40*9.81-(1029.7-1017.9)

T=380.6N

(c)  Archimedes principle state that, the buoyant force on the block equals the weight of the displaced water. Thus,

Buoyant force=rho *g*h

= = 1000* 0.100^2 * 0.120 m *9.80 m s=11.8 N

from the answer a Ftop-Fbot

1029.7-1017.9=11.8N, the same as the buoyant force

You might be interested in
A machine has a mechanical advantage of 4.5. What force is put out by the machine if the force applied to the machine is 800 N?
DerKrebs [107]
<span>Describe the action of protein carrier: ATP synthase? Explain why it is important to have build up of Hydrogen ions inside the thylakoid? 

</span>
5 0
3 years ago
Why is it important to know how fast a roller coaster travels at certain points on the track?
jolli1 [7]

It's important because you have to know when to make it go faster or else you might not be able to go upside down or in a circle
6 0
2 years ago
Read 2 more answers
6.6 kg block initially at rest is pulled to theright along a horizontal, frictionless surfaceby a constant, horizontal force of
neonofarm [45]

Answer:

v = 3.04 m/s

Explanation:

given,

mass of the block, M = 6.6 Kg

horizontal force, F = 12.2 N

distance, L = 2.5 m

initial speed  = 0 m/s

speed of the block,v = ?

we now

Work done is equal to change in Kinetic energy.

Work done = Force x displacement

W = Δ K E

Δ K E = Force x displacement

\dfrac{1}{2}mv^2 - \dfrac{1}{2}mu^2= F .s

\dfrac{1}{2}\times 6.6 \times v^2 - 0= 12.2\times 2.5

 3.3 v² = 30.5

     v² = 9.242

      v = 3.04 m/s

speed of the block is equal to 3.04 m/s

4 0
2 years ago
Two samples of dirt are collected from a suspect's tread in his shoe and a crime scene. She notes very similar characteristics.
elena-14-01-66 [18.8K]

brainly.com/question/11542618?answering=true&answeringSource=greatJob%2FquestionPage

8 0
3 years ago
At what point in the swing of the pendulum is the potential energy completely converted into Kinetic energy
artcher [175]
Point a because point a is the highest at potential energy converting into the highest kinetic energy.
4 0
2 years ago
Read 2 more answers
Other questions:
  • Sound with frequency 1220Hz leaves a room through a doorway with a width of 1.13m . At what minimum angle relative to the center
    8·1 answer
  • You are moving into an apartment and take the elevator to the 6th floor. Suppose your weight is 790 N and that of your belonging
    12·1 answer
  • In an internal combustion engine, the gas vapor/air mixture enters the cylinder during the _____ stroke. intake compression powe
    6·1 answer
  • What is the work done by 20 Newton force applied at an angle of 45.0° to move a box a horizontal distance of 40 meters
    5·2 answers
  • If this were a theoretical frictionless plane, what would be the mechanical advantage?
    12·1 answer
  • What unit describes thr magnitude, or size of a force?
    8·2 answers
  • Which is an indication that a man might be choking
    11·2 answers
  • Consider a solid sphere and a solid disk with the same radius and the same mass. Explain why the solid disk has a greater moment
    12·1 answer
  • Talking to adults can be intimidating and uncomfortable if you do not yet feel like one. However, learning how to effectivelycom
    10·1 answer
  • Which of the following cart configurations could produce the X versus T graph shown
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!