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
steposvetlana [31]
3 years ago
11

8. What will be the extension of a spring of K = 10 N/m, if the load is 75g?​

Physics
1 answer:
ira [324]3 years ago
4 0

Answer:

<em>The extension of the spring is 7.35 cm</em>

Explanation:

<u>Spring Force </u>

When a spring is compressed or extended by a distance x, it exerts a force given by the Hooke's Law:

F=k.x

Where k is the constant of the spring.

A mass of m=75 gr is hung to the spring of constant k=10 N/m. The force applied to the spring is the weight of the mass:

W = mg

The mass must be converted to kg:

m = 75/1000 = 0.075 kg

W=0.075*9.8

W = 0.735 N

The extension of the spring can be computed by solving for x:

\displaystyle x=\frac{0.735}{10}

x=0.0735 m

x = 7.35 cm

The extension of the spring is 7.35 cm

You might be interested in
according to newtons second law of motion, when an object is acted on by an unbalanced force, how will that object respond?
olga_2 [115]
When an object is acted on by an unbalanced force, then that object will accelerate.
6 0
3 years ago
Read 2 more answers
A bicyclist is travelling at 25 m/s when he begins to decelerate at -4m/s2 . How fast is travelling after 5 seconds
Umnica [9.8K]

Initial velocity (Vi) = 25 m/s

acceleration (a) = -4 m/s^{2}

time interval (t) = 5 sec

let us assume that final velocity after 5 sec be Vf

As acceleration is constant, we can apply the the equation of motion with constant acceleration i.e. V_{f} = V_{i} + at

Hence, V_{f} = 25 +(-4)(5) = 25 -20 = 5 m/s

so, the velocity of bicyclist will be 5 m/s after 5 sec

7 0
3 years ago
A uniform marble rolls down a symmetrical bowl, start- ing from rest at the top of the left side. The top of each side is a dist
Paha777 [63]

Answer:

Part a)

h' = \frac{10}{14} h

Part b)

if both sides are rough then it will reach the same height on the other side because the energy is being conserved.

Part c)

Since marble will go to same height when it is rough while when it is smooth then it will go to the height

h' = \frac{10}{14} h

so on smooth it will go to lower height

Explanation:

As we know by energy conservation the total energy at the bottom of the bowl is given as

\frac{1}{2} mv^2 + \frac{1}{2}I\omega^2 = mgh

here we know that on the left side the ball is rolling due to which it is having rotational and transnational both kinetic energy

now on the right side of the bowl there is no friction

so its rotational kinetic energy will not change and remains the same

so it will have

\frac{1}{2}mv^2 = mgh'

now we know that

I = \frac{2}{5}mr^2

\omega = \frac{v}{r}

so we have

\frac{1}{2}mv^2 + \frac{1}{2}(\frac{2}{5}mr^2)(\frac{v}{r})^2 = mgh

\frac{1}{2}mv^2 + \frac{1}{5}mv^2 = mgh

\frac{7}{10}mv^2 = mgh

\frac{1}{2}mv^2 = \frac{10}{14}mgh

so the height on the smooth side is given as

h' = \frac{10}{14} h

Part b)

if both sides are rough then it will reach the same height on the other side because the energy is being conserved.

Part c)

Since marble will go to same height when it is rough while when it is smooth then it will go to the height

h' = \frac{10}{14} h

so on smooth it will go to lower height

6 0
4 years ago
Read 2 more answers
Would u rather/ be able to fly. or be able to turn invisable
mojhsa [17]

Answer:

fly......................

4 0
3 years ago
Read 2 more answers
Perpetual motion machines have fascinated people especially inventors for hundreds of years before the laws of thermodynamics be
Cerrena [4.2K]

Given the fact that energy conversion is not entirely efficient, it is impossible to produce a perpetual motion machine.

<h3>What is a perpetual motion machine?</h3>

The perpetual motion machine in one that is able to work continuously without stopping. This would mean that the efficiency of this machine must that the machine is 100% efficient which violates the second law of thermodynamics.

Thus, given the fact that energy conversion is not entirely efficient and energy looses cause machines not function effectively, it is impossible to produce a perpetual motion machine.

Learn kore about a perpetual motion machine:brainly.com/question/13001849

#SPJ1

5 0
2 years ago
Other questions:
  • Which acceleration does the force of earth’s gravity produce?
    10·1 answer
  • true or false? J. J Thomson presented a plum pudding model of the atom. His model showed electrons randomly embedded in a cloud
    15·2 answers
  • Scientists use the term _____________ to describe the concept of energy flow through living systems
    7·1 answer
  • In Young’s double-slit experiment using monochromatic light, the interference pattern consists of a central _____.
    14·2 answers
  • A laser beam of total power 1 mW and wavelength 365 nm is incident on a clean piece of metal in vacuum. The metal has a work fun
    15·1 answer
  • A box weighing 52.4 N is sliding on a rough horizontal floor with a constant friction force of magnitude LaTeX: ff. The box's in
    14·1 answer
  • Explain the relationship between air resistance and gravitational acceleration on a falling object
    11·1 answer
  • A soccerball is kicked straight out from a hill at 15 m/s and lands 42m away. how tall is the hill
    12·1 answer
  • What does the model below represent?
    12·2 answers
  • It is 2058 and you are taking your grandchildren to Mars. At an elevation of 34.7 km above the surface of Mars, your spacecraft
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!