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
Tanya [424]
3 years ago
8

A force of 9 pounds stretches a spring 1 foot. A mass weighing 6.4 pounds is attached to the spring, and the system is then imme

rsed in a medium that offers a damping force numerically equal to 1.2 times the instantaneous velocity. Find the equation of motion If the mass is initially released from rest from a point 1 foot above the equilibrium position.
Physics
1 answer:
mart [117]3 years ago
7 0

Answer:

\frac{d^2x}{dt^2}+\frac{\beta}{m}\frac{dx}{dt}+\frac{k}{m}x=0

Explanation:

let m be the mass attached, let k be the spring constant and let \beta be the positive damping constant.

-By Newton's second law:

m\frac{d^2x}{dt^2}=-kx-\beta \frac{dx}{dt}

where x(t) is the displacement from equilibrium position. The equation can be transformed into:

\frac{d^2x}{dt^2}+\frac{\beta}{m}\frac{dx}{dt}+\frac{k}{m}x=0  shich is the equation of motion.

You might be interested in
Homework help asap!!
ozzi
Where is the picture cant6 see it

7 0
4 years ago
2. A brick is sitting on a building 22 m high. It has a mass of 7.9 kg. What amount of potential
Citrus2011 [14]

Answer:

1703.24J

Explanation:

Given parameters:

Mass of brick  = 7.9kg

Height of building  = 22m

Unknown:

Potential energy of the brick  = ?

Solution:

The potential energy of a body is the energy at rest of the body. Mathematically;

 

         P.E = mgh

m is the mass of the brick

g is the acceleration due to gravity

h is the height of the building

  Insert the given parameters and solve;

        P.E  = 7.9 x 9.8 x 22  = 1703.24J

6 0
3 years ago
The BMI of someone that weights 121 pounds and is 64 inches tall:
nordsb [41]

Answer:

B

;)

Explanation:

8 0
3 years ago
Read 2 more answers
Two blocks of masses m and 3m are placed on a frictionless, horizontal surface. A light spring is attached to the more massive b
ivanzaharov [21]

Answer:

Explanation:

a ) Conservation of momentum is followed

m₁ v₁  = m₂ v₂

3m x 2 = m  v

v = 6 m/s

Total kinetic energy

= 1/2 x .35 x 6 ² + 1/2 x 1.05 x 2 ²

= 8.4 J

This energy must be stored as elastic energy in the spring which was released as kinetic energy on burning the cord.

Yes , the conservation of momentum will be followed  in the bursting apart process. Only internal forces have been involved in the process. Two equal and opposite internal forces are created by spring which creates motion and generates kinetic energy.

4 0
3 years ago
The force of gravity on a 2-kg rock is twice as great as that on a 1-kg rock. why then doesn't the heavier rock fall faster?
katrin2010 [14]
It takes twice the force to produce the same acceleration in the 2kg rock. 
5 0
3 years ago
Other questions:
  • Which is an example of a covalent bond?
    14·1 answer
  • Which element causes a star to go through a high mass cycle
    10·1 answer
  • The speed of an electromagnetic wave is equal to
    5·1 answer
  • Assume we’re able to travel to your planet and decide to take some fireworks with us to celebrate our journey.
    11·1 answer
  • A grandfather clock depends on the period of a pendulum to keep correct time. Suppose a grandfather clock is calibrated correctl
    7·2 answers
  • a car starts from rest and increases its speed to 15 m/s in 20 seconds. what is the cars acceleration
    5·2 answers
  • A bumblebee darts past at 3 m/s. The frequency of the hum made by its wings is 152 Hz. Assume the speed of sound to be 342 m/s.
    10·2 answers
  • A 2100 kg car starts from rest and accelerates at a rate of 2.6 m/s2 for 4.0 s. Assume that the force acting to accelerate the c
    11·1 answer
  • Jim can ride his bike at 12 meters per second. Bob can ride his bike at 10.5 m/s. If they
    14·1 answer
  • Which of the following is not part of the control system? steering wheel exhaust pipe brake accelerator
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!