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
klio [65]
3 years ago
13

You're carrying a 3.2-m-long, 24kg pole to a construction site when you decide to stop for a rest. You place one end of the pole

on a fence post and hold the other end of the pole 35cm from its tip.How much force must you exert to keep the pole motionless in a horizontal position?NExpress your answer using two significant figures.
Physics
1 answer:
Aleksandr [31]3 years ago
5 0

Answer:

Tension of 132N

Explanation:

We need to apply Summatory of Force to find the tension in the hand.

We define te tensión in the hand as F_2 and the Tension in fence post as F_1, then

\sum F = 24(9.8)

F_1 + F_2= 24(9.8)

We apply summatory of moments then

F_2*1.25 = F_1*1.6

Where the Force 2 is 1.25m from the center of summatory,

We can note that,

1.6 m - 0.35m=1.25m

We have two equation and two incognites, then replacing (1) in (2)

1.6(235.2 -F_2) = 1.25F_2

376.32 = F2(1.6+1.25)

F_2= \frac{376.32}{2.85}

F_2 =132 N

You might be interested in
A baseball accelerates downward at 9.8m/s. if the gravitational force acting on the baseball is 2.2n what is the baseballs mass
Neko [114]
hope this helps you.....

5 0
3 years ago
Who made advances to our understanding of the conscious and unconscious mind?
NARA [144]
The unconscious mind plays a large role in Sigmund Freud's psychoanalysis<span>. He discussed the importance of the unconscious mind in understanding conscious thought and behaviour.   </span><span>Sigmund Freud

</span>
4 0
3 years ago
Read 2 more answers
An object is placed in front of a diverging lens, such that the object-to-image distance is 71 cm.
Pachacha [2.7K]

Explanation:

Given that,

Object-to-image distance d= 71 cm

Image distance = 26 cm

We need to calculate the object distance

u -v= d

u=71+26=97\ cm

We need to calculate the focal length

Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

put the value into the formula

\dfrac{1}{f}=\dfrac{1}{-26}+\dfrac{1}{97}

\dfrac{1}{f}=-\dfrac{71}{2522}

f=-35.52\ cm

The focal length of the lens is 35.52.

(B). Given that,

Object distance = 95 cm

Focal length = 29 cm

We need to calculate the distance of the image

Using formula of lens

\dfrac{1}{f}=\dfrac{1}{v}-\dfrac{1}{u}

Put the value in to the formula

\dfrac{1}{-29}=\dfrac{1}{v}-\dfrac{1}{95}

\dfrac{1}{v}=\dfrac{1}{-29}-\dfrac{1}{95}

\dfrac{1}{v}=-\dfrac{124}{2755}

v=-22.21\ cm

We need to calculate the magnification

Using formula of magnification

m=\dfrac{v}{u}

m=\dfrac{22.21}{95}

m=0.233

The magnification is 0.233.

The image is virtual.

Hence, This is the required solution.

4 0
3 years ago
Which of these is the most likely impact of solar prominence on Earth?
svlad2 [7]

<span>Solar prominences themselves are of no concern because they are visible in the Hydrogen Alpha wavelength. They are anchored in place by magnetic fields. When these fields break or reconnect, it can send the plasma that makes up the prominence away from the sun. If one of these clouds impacts Earth, they are called CMEs or coronal mass ejections. Depending on the magnetic orientation of the cloud with respect to Earth's the CME can break down our magnetic field resulting in geomagnetic storms, aurorae, power grid fluctuations, and particle radiation near the poles, satellite single upset events, and radio blackouts. </span>

<span>
</span>

<span>Thus, letter a is the answer. </span>

8 0
3 years ago
The sun's radiation has different wavelengths. the shorter is the radiation's wavelength, the weaker is the radiation's energy.
NeX [460]
It is false. Because the amount of energy carried in the wave is inversely related to the length of the waves wavelength. To correct the statement it should be that the shorter the radiation's wavelength the stronger is the radiation's energy.
7 0
3 years ago
Other questions:
  • Which statement BEST explains why the specific heat of water is higher than the specific heat of most other substances?
    6·2 answers
  • Games in Space: On Earth, an astronaut throws a ball straight upward, and it stays in the air for a total of 3.0s before they ca
    12·1 answer
  • An object acted on by three forces moves with constant velocity. one force acting on the object is in the positive x direction a
    8·1 answer
  • If you double your speed, your kinetic energy will increase by:
    13·1 answer
  • In water, acids form _____.
    15·2 answers
  • Hamid is going to heat sodium chloride and water in a beaker. How can he carry out his experiment as
    13·1 answer
  • In a collision that is not perfectly elastic, what happens to the mechanical energy of the system?
    5·1 answer
  • How do I solve this?
    14·2 answers
  • Which energy changes take place when a pedaling cyclist uses a generator (dynamo) to light his bicycle
    6·2 answers
  • Which red line shows the same action spectrum corrected for the unequal number of photons emitted across the visible spectrum?.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!