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
torisob [31]
3 years ago
13

A 2.85 kg fish is attached to the lower end of a vertical spring that has negligible mass and force constant 875 N/m. The spring

initially is neither stretched nor compressed. The fish is released from rest.A)What is its speed after it has descended 0.0580 m from its initial position? B)What is the maximum speed of the fish as it descends?
Physics
1 answer:
Westkost [7]3 years ago
4 0

Answer:

A) V = 0.324 m/s

B) V = 0.56 m/s

Explanation:

A) Change in gravitational potential energy = mass * gravity * height change

Change in G.P.E = 2.85 * 9.81 * 0.058 = 1.6215 J

Energy transferred to spring = 0.5 * k * x^2

Here k = 875 N/m

And x = 0.058 m

Thus energy transferred to spring = 1.47175 J

The G.P.E is converted to spring potential energy and kinetic energy as it moves down. So the difference in energy is accounted by kinetic energy as follows:

Kinetic energy = G.P.E - Spring P.E

Kinetic energy = 1.6215 - 1.47175 = 0.14975 J

We can now find the speed using this kinetic energy:

Kinetic energy = 0.14975

0.5 * mass * velocity^2 = 0.14975

0.5 * 2.85 * V^2 = 0.14975

V = 0.324 m/s

B) The fish accelerates because the force on it are unbalanced. These forces are the weight of the fish, and the force of the spring stopping it.

As long as the weight of the fish is more than the upward force of the spring, the fish will continue to accelerate. Using this knowledge, we can deduce that the speed is maximum when the weight and spring force are equal. Thus we set them equal and find out the displacement first:

Weight = spring force

2.85 * 9.81 = 875 * Displacement

Displacement = 0.03195 m

Similarly as (A):

Change in G.P.E = 2.85 * 9.81 * 0.03195 = 0.8933 J

Spring P.E = 0.5 * 875 * 0.03195^2 = 0.4466 J

Kinetic energy = 0.8933 - 0.4466 = 0.4467 J

0.5 * mass * V^2 = 0.4467

0.5 * 2.85 * V^2 = 0.4467

V = 0.56 m/s

You might be interested in
Which process enables the boy to see over the wall?
den301095 [7]

Answer:    yeah it is reflection

6 0
2 years ago
A 750-newton person stands in an elevator that is
blondinia [14]
When an elevator is accelerating downward, the normal force is equal to mg-ma (hence you feel a little lighter when accelerating downwards)

Therefore, the upward force of the elevator floor on the person must be less than 750N
8 0
3 years ago
Blood is tissue .how?​
Levart [38]
Yes, blood is a tissue. It is a tissue because it is a group of similar cells that have functions.
3 0
2 years ago
Read 2 more answers
Analyzing a blood sample usually involves which type of separation method?
schepotkina [342]

Answer:(D.)

Explanation:

4 0
3 years ago
Calculate the work done if a boy lifts a bag of cement 500N to the floor of a lorry 2.5m above the ground
eduard

Answer:

W = 1250 J = 1.25 KJ

Explanation:

The work done by the boy is due to the change in the position of the cement vertically. Hence, the work done in this case will be equal to the potential energy of the cement:

W = P.E\\W = mgh

where,

W = Work done = ?

mg = W = weight of cement = 500 N

h = height covered = 2.5 m

Therefore,

W = (500\ N)(2.5\ m)

<u>W = 1250 J = 1.25 KJ</u>

4 0
2 years ago
Other questions:
  • What force is required to accelerate a body with the mass of 15 kilograms at a rate of 8m/s2?
    6·1 answer
  • What is the absolute value of the horizontal force that each athlete exerts against the ground?
    10·1 answer
  • How does speed relate to the distance covered and the time taken for travel?
    7·1 answer
  • I don't know how to do this. Working on #2
    14·1 answer
  • A student look at ocean waves coming into the beach. An oceanwavd with more energy will
    13·2 answers
  • Please need help on this I know it’s not D an atom.
    7·1 answer
  • A man claims that he can hold onto a 16.0-kg child in a head-on collision as long as he has his seat belt on. Consider this man
    10·1 answer
  • A golf ball starts with an initial velocity of 100m/s and slows at a constant rate of -8m/s2, what is its final velocity after 2
    6·1 answer
  • What is the average income of an osteologist? (Anatomy)
    6·1 answer
  • Can someone pretty please help? will give brainliest and thats a promise
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!