why we express the unit of torque in Nm.even though it can
be expressed as Joule ( J )?
Answers were Sorted based on User's Feedback
Answer / ranjeet k jaiswal
Torque is a vector qty ,that is why we use vector unit Nm.
Joule is used for scalar qty.
Is This Answer Correct ? | 29 Yes | 6 No |
Answer / naseeb ahmeds
The torque is directly depend on applied force& distance at
which it is acting so it is-N-m
we are getting a secondary motion from torque,which can give
us the energy but the phillosophy behind this is a motion
not an direct energy......and joule is a unit of energy.
Is This Answer Correct ? | 26 Yes | 14 No |
the eq. of TORQUE = FORCE X RADIUS
& NEWTON & METER are the one of the units of
Force & radius respectively
Is This Answer Correct ? | 31 Yes | 21 No |
Answer / manojsiva v
work done(form of energy)=force.distance (dot product ie scalar quantity,energy is always scalar)
torque=force*distance (vector quantity,cross product)
torque and energy are related by
energy=torue.(theta)
a torque of 1 N m applied through a full revolution will require an energy of exactly 2π joules
torque=1Nm
theta=2π
hence conventionally in SI unit energy is represented in joule and torque is not a form of energy so Nm.
Is This Answer Correct ? | 10 Yes | 2 No |
Answer / karthick
torque is related to work done.it is expressed as force *
radius.so its unit should be N-m whereas joule is used to
represent the heat given out from a process
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / nandakumar
Joule is the unit of energy. 1J= 1 Nm.
Energy = force * displacement ( N*m)
but Torque = force * radius (N*m) but there is no displacement.when we apply a torque on a body, if work is done the body will rotate.
then work done is calculated as torque*angular displacement
so the unit is N*m*radian(unit of angular displacement)
hence 1J=1 N*m*radian. the radian is an auxiliary unit and is always hidden when it is multiplied with metre.
so 1Nm torque is not equal to 1 J but 1Nm energy = 1J
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / saurabh malviya
joule is always a unit of energy no matter of which type
it is ... torque is simply nt an energy bt a cause of
energy dats why its nt expressed in joule ...
Is This Answer Correct ? | 1 Yes | 0 No |
Answer / anil
Torque is mechanical energy and Joule is its equivvlent in
heat energy
Is This Answer Correct ? | 5 Yes | 5 No |
Answer / khalid usmani
for example .
if we have to find diameter of shaft of any material and we
take as C-45 material of shaft whose permissible shear
stress is 45*10^6 N/M^2
SO as Torque = (22/7)/16 * (shear stress) * d^3
therefore its unit will be Nm
Is This Answer Correct ? | 2 Yes | 5 No |
composition of cast iron fc-500,fc-550,& fc-260 which is use in sheet metal industries as a piller set
If you have a valve with an applied pressure, how do you determine the stress to the closed and open valve?
What is the need for drafting?
diffuser increases pressure but in turbine pressure is decreasing when steam passing through casing?
5 Answers MAHINDRA, NTPC, Qatar Gas,
is pneumatic cylinder can be used as hydraulic cyclider for same pressure.
If we want to move one ms channel on the lm guide. Its channel size is -W-300mm, H-400mm, L - 3ft. then how many load come on the lm guide. its lm guide is one tipe of bearing.
why we did't use petrol engine for haevy purpose...?
i just wanted to ask that what should one do to clear all the concepts a mechanical engineer needs to have cleared,this not only includes the concepts of each and every semester of his engineering course, but also the basic laws and fundamentals of physics(that required for Mechanical engineering).I am a third year mechanical engineering student and i am very keen to know about the above question. somebody please help me.
Accelerometers measure acceleration. How do you measure the moment of inertia?
What is the seal packing gland for turbine?
2 Answers ABC Inc, RRB, Siemens,
Where do you put the oil in a compressor?
If we heat the rod what will happen,draw stress & strain curve before after heating ?