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
Nuetrik [128]
1 year ago
14

A uniform bar has a mass of 2.2 kg and the angle shown is 30 degrees. Calculate the net torque about the point P for the bar. Do

not ignore the weight of the bar.

Physics
1 answer:
Sholpan [36]1 year ago
3 0

The free body diagram of the bas is shown below:

The torque is given by:

\tau=r_{\perp}F

where F is the force and:

r_{\perp}

is the perpendicular distance between the rotation axis and the line of action of the force, which we called the moment arm. We know that the torque follows the principle of superposition then to find the total torque we need to add the torque each force exert. Before we do this we need to find the correct sign of the torque so we need to remember that if a force makes an object rotate counterclockwise then the torque is positive; otherwise it is negative. In this case Force two will exert a positive torque while the other two forces acting on the bar exert a negative torque.

For force one and the weight the moments arms are 5 m and 2.5 m, respectively. This comes from the fact that the forces are perpendicular to the rod.

For force two the moment arm is given as:

r_{\perp}=2\sin 30=1

Hence the total torque is given by:

\begin{gathered} \tau=F_2r_{\perp2}+Wr_{\perp w}+F_1r_{\perp1} \\ \tau=(150)(1)-(9.8)(2.2)(2.5)-(20)(5) \\ \tau=-3.9 \end{gathered}

Therefore, the total torque on the bar is -3.9 Nm (this means that the bar will rotate clockwise).

You might be interested in
Would hurt if u have a baby?
Shkiper50 [21]

Answer:

yes it would.

Explanation:

7 0
3 years ago
Read 2 more answers
A miner develops cancer of the esophagus. Ten years before, he had been exposed to radiation when he worked for a year in a mine
slamgirl [31]

D.) It is unlikely that a specific cause can be determined, but the treatment would likely be the same in either case.

3 0
3 years ago
Read 2 more answers
Which of the following examples best describe using an inclined plane
Alinara [238K]
The best possible Answer is c
8 0
3 years ago
You do 20 J of work pushing a crate up a ramp. If the output work from the inclined plane is 11 J, then what is the efficiency o
fomenos

Answer:

55%

Explanation:

take efficiency=power output/power input multiply by 100%

5 0
3 years ago
which force field can accelerate an electron, but never change its speed? a) electric field b) magnetic field c) both of these d
Drupady [299]

Option a; Electric field can accelerate an electron, but never change its speed

An electric field (also known as an E-field) is a physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them. It can also refer to the physical field of a charged particle system. Electric fields are created by electric charges and time-varying electric currents. Electric and magnetic fields are both aspects of the electromagnetic field, one of nature's four fundamental interactions (also known as forces). Electric fields are significant in many areas of physics and are used in electrical technology. In atomic physics and chemistry, for example, the electric field is the attractive force that holds the atomic nucleus and electrons together in atoms. It is also the driving force behind chemical bonds between atoms.

Learn more about Electric field here:

brainly.com/question/15800304

#SPJ4

4 0
1 year ago
Other questions:
  • 16. At a particular point, a satellite in an elliptical orbit has a gravitational potential energy of 7000 MJ with respect to Ea
    12·1 answer
  • How do you find average velocity during free fall?
    8·2 answers
  • Low-mass and medium-mass stars eventually
    10·1 answer
  • What is the definition of density
    6·2 answers
  • Planet Tatoone is about 1.7 AU from its Sun. Approximately how long will it take for light to travel from the Sun to Tatoone in
    6·1 answer
  • what is the closest to the order of magnitude of the energy rquired to split a nucleus in to its individual protons and neutrons
    12·1 answer
  • The constant movement of rising warm air and sinking cool air in Earth's atmosphere is called atmospheric convection. What does
    12·1 answer
  • a waterwheel built in Hamah, Syria, has a radius of 20 m . If the tangential velocity at the wheels edge is 7.85 m/s , what is t
    7·1 answer
  • How many laws of Newton and who​
    14·2 answers
  • Metal workers and theory causes of accident<br>​
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!