Answer / jiya malik

Torque is a turning effect of force while energy is heat. So to differentiate between them they have different units so that one can be avoid of misunderstanding.

Answer / lorde banks

-Torque has dimension force times distance, symbolically L^2MT^−2. Official SI literature suggests using the unit newton metre (N⋅m) or the unit joule per radian. The unit newton metre is properly denoted N⋅m or N m. This avoids ambiguity with mN, millinewtons.
-The SI unit for energy or work is the joule. It is dimensionally equivalent to a force of one newton acting over a distance of one metre, but it is not used for torque. Energy and torque are entirely different concepts, so the practice of using different unit names (i.e., reserving newton metres for torque and using only joules for energy) helps avoid mistakes and misunderstandings. The dimensional equivalence of these units is not simply a coincidence: a torque of 1 N⋅m applied through a full revolution will require an energy of exactly 2π joules. Mathematically,

{ E= au heta } E= au heta
where E is the energy, τ is magnitude of the torque, and θ is the angle moved (in radians). This equation motivates the alternate unit name joules per radian.

In Imperial units, "pound-force-feet" (lbf⋅ft), "foot-pounds-force", "inch-pounds-force", "ounce-force-inches" (ozf⋅in) are used, and other non-SI units of torque includes "metre-kilograms-force". For all these units, the word "force" is often left out. For example, abbreviating "pound-force-foot" to simply "pound-foot" (in this case, it would be implicit that the "pound" is pound-force and not pound-mass). This is an example of the confusion caused by the use of English units that may be avoided with SI units because of the careful distinction in SI between force (in newtons) and mass (in kilograms).

Torque is sometimes listed with units that do not make dimensional sense, such as the gram-centimeter. In this case, "gram" should be understood as the force given by the weight of 1 gram on the surface of the Earth (i.e. 0.00980665 N). The surface of the Earth has a standard gravitational field strength of 9.80665 N/kg.

Answer / pramit kumar

joule is also N-m, but joule is associated with heat but
for the unit of torque we must use N-m. Moreover heat
(joule) is a low grade energy and work (torque or shaft
work) is a high grade energy, low grade energy can be
completly fully converted to high grade but the vice versa
is not true. If numericaly we need to convert work to heat
then we must divide work by joule constant.

Answer / vairaprakash

TORQUE IS OBTAINED AFTER THE DESTRUCTION OF SOME HEAT OR
ENERGY AND AT THE SAME TIME IT IS ONLY THE OUTPUT OF SOME
WORK OR WORKDONE BY SOME ENERGY. SINCE IT IS THE OUTPUT IT
CANT BE GIVEN THE SAME UNIT AS INPUT.

Answer / shirin.r.s

torque is a vector quantity.it has magnitude and
direction.Its magnitude part has unit N-M and direction part
may be in rpm or angle.
eg:1000N-M @ 10000rpm.

Answer / karthick

this is like the diff b/w energy and workdone.energy is
represented in joule and work is in N-m.energy is the
abilty or capacity to do work.torque is related to workdone
by a circular object so it shd b represented in N-m

Answer / rahul

High torque means high force needed to rotate the rotating
member or low force is needed?

which is correct answer

Answer / saichandra

Toque isthe tendency of a force of perpendicular distance
from line of action to the axis of rotation, where as Joule
is the namw of the inventor.

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