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
mr_godi [17]
3 years ago
9

A ruler of length 0.30m is pivoted at its centre. Equal and opposite forces of magnitude 2.0N are applied to the ends of the rul

er, creating a couple which create an angle of 50o with the ruler. What is the magnitude of the torque of the couple on the ruler.
Physics
1 answer:
kow [346]3 years ago
6 0

Answer:

0.3858 Nm

Explanation:

The torque of the couple is the dot product of the force vector and the couple vector from 1 end of the ruler to the center. This equals to the product of their magnitude times the cosine() of the angle made by their direction:

T = \vec{F} \cdot \vec{s} = Fscos(50^0) = 2 * 0.3 * 0.643 = 0.3858 Nm

You might be interested in
If the spring constant is doubled, what value does the period have for a mass on a spring? A. The period would double by square
antoniya [11.8K]

Answer:

The period would decrease by sqrt(2)

Explanation:

The restoring force is given by,

F = -kx

According to Newton's second law of motion,

ma = -kx

ma + kx = 0

The time period is given by,

T =\frac{2\pi }{\omega }

Where \omega is the angular velocity and it is given by,

\omega = \sqrt{\frac{k}{m} }

Now if the spring constant is doubled then,

k_{2} = 2k

Thus,

T_{2} =\frac{2\pi }{\sqrt{\frac{2k}{m} } }

\frac{T_{2} }{T} = \frac{\frac{2\pi }{\sqrt{\frac{2k}{m} } }}{\frac{2\pi }{\sqrt{\frac{k}{m} } }}

\frac{T_{2} }{T} = \sqrt{\frac{k}{2k} } = \sqrt{\frac{1}{2} }

T_{2} = \frac{T}{\sqrt{2} }

Thus, The period would decrease by sqrt(2).

Hence, option D is correct.

3 0
3 years ago
Read 2 more answers
DON'T ANSWER IF YOU DON'T KNOW
Darina [25.2K]

Answer:

the answer is Natural selection

3 0
3 years ago
Read 2 more answers
What important event takes place during the interphase of the cell cycle?
yan [13]
The dna is multiplied obviously
5 0
3 years ago
Read 2 more answers
What is the is the 94th element of the periodic table
shutvik [7]

Answer:

plutonium

Explanation:

6 0
3 years ago
What is the role of equations in this course?
Karolina [17]
That will depend on which course you're talking about. It will be a minor role in, say, Maritime Law or Comparitive Religion, but a major one in, say, Particle Physics or Linear Algebra.
4 0
3 years ago
Other questions:
  • Letters A, B, C, and D represent locations on a bar magnet. Which location has the greatest magnetic force?
    15·2 answers
  • Sally made breakfast for the family on Saturday morning. She put some bread in the toaster. When the bread popped up, Sally grab
    14·2 answers
  • Which equation could be rearranged to calculate the frequency of a wave?
    6·1 answer
  • A gas fills the right portion of a horizontal cylinder whose radius is 5.33 cm. The initial pressure of the gas is 2.29 x 105 Pa
    6·1 answer
  • All of the alkali metals, Group 1, have one valence electron. which of these would represent the oxidation number of the alkali
    10·1 answer
  • The diagram shows a sealed container, which
    15·2 answers
  • Acceleration is directly proportional to net force. What is the relationship between acceleration and mass?
    11·1 answer
  • What is the acceleration of a bike that starts from rest and after 10s is traveling 20m/s?
    15·1 answer
  • Which of the following scenarios represents a safe situation for the child?
    9·2 answers
  • Which of the following is a form of technology ?
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!