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
aivan3 [116]
3 years ago
9

A spring that is compressed 14.5 cm from its equilibrium position stores 2.99 J of potential energy. Determine the spring consta

nt.
Physics
1 answer:
strojnjashka [21]3 years ago
7 0

Answer:

284.4233 N/m

Explanation:

k = Spring constant

x = Compression of spring = 14.5 cm

U = Potential energy = 2.99 J

The potential energy of a spring is given by

U=\dfrac{1}{2}kx^2

Rearranging to get the value of k

\\\Rightarrow k=\dfrac{2U}{x^2}\\\Rightarrow k=\dfrac{2\times 2.99}{0.145^2}\\\Rightarrow k=284.4233\ N/m

The spring constant is 284.4233 N/m

You might be interested in
A 12.6-kg monkey is hanging by one arm from a branch and swinging on a vertical circle. As an approximation, assume a radial dis
Zinaida [17]

Answer:

a)27.3N

b)150.78N

Explanation:

Having in mind the conservation of energy, as the monkey goes up (gaining potential gravitational energy) the kinetic energy must be reduced, so reducing the velocity of the monkey. So the maximum velocity will be at this lower point with a velocity of 1.36m/s

From this velocity and the radius we can calculate the angular velocity for the monkey center of mass:

w=\frac{1.36m/s}{0.853m} =1.594 /s

with this we can calculate the centripetal force magnitude:

F=m*w^{2} *r=12.6kg*(1.594/s)^{2} *0.853m=27.3N

On the mokey center of mass we have two opposite forces acting, the tension of the arm and the weight, in order for the monkey to continue swinging the resolt of this two forces must be equal to the centripetal force:

T-P=F=>T=F+P

T=27.3N+12.6kg*9.8m/s^{2}=150.78N

8 0
3 years ago
If a 42kg rolling object slows from 11.5 m/s to 3.33 m/s how much work does friction do?
lara31 [8.8K]

Explanation:

work done by friction = 1/2 x 42 x ( 3.33^2 - 11.5^2)

= 21 ( 11.08 - 132.25)

= 21 ( - 121.17 )

= - 2544.57 J

4 0
3 years ago
What is the Force in Newtons exerted by an object with a mass of 15 kg and an Acceleration of 12 m/s2?
ZanzabumX [31]
Force = mass * acceleration
F = ma
F = (15)(12)
F = 180N
5 0
3 years ago
A shopper walks westward 2.8 meters in the first 5 minutes and then eastward 9.2 meters in the next 10 minutes. What is the shop
Alecsey [184]

Answer:

12m

Explanation:

Given parameters:

Distance walked westward  = 2.8m

Time of travel  = 5min

Distance walked eastward = 9.2m

Time of travel  = 10min

Unknown:

The total shopper's travel distance  = ?

Solution:

Total distance traveled is the sum of the length of path covered by a body. It is a scalar quantity.

 Total distance = distance walked westward + distance walked eastward

  Total distance  = 2.8m + 9.2m  = 12m

6 0
2 years ago
А______<br> is a unit of measurement for energy. (7 Letters)
a_sh-v [17]

Answer:

Joule or kilowatt/hour

7 0
2 years ago
Other questions:
  • PLEASE ANSWER!!!!!
    13·1 answer
  • In which of the following cases is the torque about the shoulder due to the weight of the arm the greatest? Case 1: A person hol
    10·1 answer
  • If state troopers were instructed to write a ticket for any motorist going 1 mph over the speed limit, one could argue that this
    5·1 answer
  • According to Kinetic Molecular Theory, which state of matter has the most kinetic energy?
    12·2 answers
  • A brass bar, density 9.87g/cm3, has a volume of 20.25cm3. What is the mass of this brass bar?
    8·1 answer
  • What would be the speed of an object just before hitting the ground if dropped 91.5 meters
    8·1 answer
  • A 20.0-kg rock is sliding on a rough, horizontal surface at 8.00 m/s and eventually stops due to friction. The coefficient of ki
    8·2 answers
  • Which title goes with this list: Amendments Articles Preamble?
    9·1 answer
  • Elena earns $10.50 per hour as a server working x hours per week. She also earns $8.50 per hour editing poetry for y hours per w
    10·1 answer
  • Light passes from an object through the video camera lens and is converted into an electrical signal by a ___________
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!