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
garik1379 [7]
3 years ago
11

A brick of mass 4 kg hangs from the end of a spring. When the brick is at rest, the spring is stretched by 3 cm. The spring is t

hen stretched an additional 2 cm and released. Assume there is no air resistance. Note that the acceleration due to gravity, g, is g=980 cm/s^2.
Set up a differential equation with initial conditions describing the motion and solve it for the displacement s(t) of the mass from its equilibrium position (with the spring stretched 3 cm).
Physics
1 answer:
jeka57 [31]3 years ago
3 0

Answer:

Explanation:

Let s be displacement from equilibrium position . Restoring force

m d²s / dt² = - k s

d²s / dt² = - k /m  s

Put k /m  = ω

d²s / dt² + ω² s = 0

The solution of this differential equation

= s = A cosωt

Now when t = 0 ,  s = 2 cm

A =  2 cm

Putting the values we have

2 = A cos 0

A = 2 cm

s ( t) = 2 cos ωt

You might be interested in
A raindrop or partially melted snowflake that freezes into a pellet of ice in a deep subfreezing layer of air near the surface i
Morgarella [4.7K]
<span>A raindrop or partially melted snowflake that freezes into a pellet of ice in a deep subfreezing layer of air near the surface is called sleet. 

Answer: Sleet 

</span><span>Hope that helps! ★ <span>If you have further questions about this question or need more help, feel free to comment below or leave me a PM. -UnicornFudge aka Nadia </span></span>
8 0
3 years ago
How society has been benefited by the knowledge of physics​
lilavasa [31]

Answer:

The introduction of machines to make work done more easier and faster

7 0
3 years ago
Read 2 more answers
Quick please and will give Brainliest!!!
masha68 [24]

25 nC

That is the answer

3 0
3 years ago
Read 2 more answers
A uniform 2.50m ladder of mass 7.30kg is leaning against a vertical wall while making an angle of 51.0degree with the floor. A w
Zigmanuir [339]

Answer:

19.95 J

Explanation:

The center of mass of the ladder is initially at a height of:

h_1=\frac{L}{2}sin\theta

The center of mass of the ladder ends at a height of:

h_2= \frac{L}{2}sin90 =L/2

So, the work done is equal to the change in potential energy which is:

W = PE = mg(h_2-h_1)

now h_2-h_1= 1-sin\theta

therefore

W = [mgL/2]×[1 - sin(theta)]

W = [(7.30)(9.81)(2.50)/2]×[1-sin(51°)]

solving this we get

W = 19.95 J

8 0
3 years ago
The hairdryer has a plastic case so there is no need for an earth wire connection in the plug.
kolbaska11 [484]
Gravitational attraction / field strength increases when closer; A light dependent resistor (LDR) can be used as a sensor to detect light intensity.
4 0
3 years ago
Other questions:
  • A boy flies a kite with the string at a 30 degree angle to the horizontal. The tension in the string is 4.5N .
    7·1 answer
  • A 2 kg ball is attached by a string to the top of a vertical pole and swings in a circle of radius 1.2 m. If the string makes an
    8·1 answer
  • Is it possible to add energy to light, thereby increasing its wavelength?
    5·1 answer
  • Two objects made of the same material are heated to 60 oC and 90 oC. According to
    10·2 answers
  • What are the orders of the lunar cycle?
    11·1 answer
  • Laissez-faire situations are characterized by a high degree of government involvement (t or <br> f.
    7·2 answers
  • What is potential difference??. Please give a detailed explanation. ​
    10·1 answer
  • 5. A 2000 kg truck has a momentum of 90,000 kg m/s. What is the velocity of the<br> truck?
    5·1 answer
  • A boy throws rocks with an initial velocity of 12m/s [down] from a 20 m bridge into a river. Consider the river to be at a heigh
    5·1 answer
  • Explain the idea of the electoral college and why the framers included this in the constitution.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!