A report on Torque

Moment arm diagram
The torque caused by the two opposing forces Fg and −Fg causes a change in the angular momentum L in the direction of that torque. This causes the top to precess.
Torque curve of a motorcycle ("BMW K 1200 R 2005"). The horizontal axis shows the speed (in rpm) that the crankshaft is turning, and the vertical axis is the torque (in newton metres) that the engine is capable of providing at that speed.

Newton-metre .

- Torque
Moment arm diagram

28 related topics with Alpha

Overall

Forces can be described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate.

Force

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Influence that can change the motion of an object.

Influence that can change the motion of an object.

Forces can be described as a push or pull on an object. They can be due to phenomena such as gravity, magnetism, or anything that might cause a mass to accelerate.
Aristotle famously described a force as anything that causes an object to undergo "unnatural motion"
Though Sir Isaac Newton's most famous equation is, he actually wrote down a different form for his second law of motion that did not use differential calculus
Free body diagrams of a block on a flat surface and an inclined plane. Forces are resolved and added together to determine their magnitudes and the net force.
Galileo Galilei was the first to point out the inherent contradictions contained in Aristotle's description of forces.
Feynman diagram for the decay of a neutron into a proton. The W boson is between two vertices indicating a repulsion.
Images of a freely falling basketball taken with a stroboscope at 20 flashes per second. The distance units on the right are multiples of about 12 millimeters. The basketball starts at rest. At the time of the first flash (distance zero) it is released, after which the number of units fallen is equal to the square of the number of flashes.
Instruments like GRAVITY provide a powerful probe for gravity force detection.
FN represents the normal force exerted on the object.
Fk is the force that responds to the load on the spring
Relationship between force (F), torque (τ), and momentum vectors (p and L) in a rotating system.

Concepts related to force include: thrust, which increases the velocity of an object; drag, which decreases the velocity of an object; and torque, which produces changes in rotational speed of an object.

A baseball pitcher does positive work on the ball by applying a force to it over the distance it moves while in his grip.

Work (physics)

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Energy transferred to or from an object via the application of force along a displacement.

Energy transferred to or from an object via the application of force along a displacement.

A baseball pitcher does positive work on the ball by applying a force to it over the distance it moves while in his grip.
Forces in springs assembled in parallel
Lotus type 119B gravity racer at Lotus 60th celebration.
Gravity racing championship in Campos Novos, Santa Catarina, Brazil, 8 September 2010.

The dimensionally equivalent newton-metre (N⋅m) is sometimes used as the measuring unit for work, but this can be confused with the measurement unit of torque.

This gyroscope remains upright while spinning due to the conservation of its angular momentum.

Angular momentum

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Rotational analog of linear momentum.

Rotational analog of linear momentum.

This gyroscope remains upright while spinning due to the conservation of its angular momentum.
Velocity of the particle m with respect to the origin O can be resolved into components parallel to (v∥) and perpendicular to (v⊥) the radius vector r. The angular momentum of m is proportional to the perpendicular component v⊥ of the velocity, or equivalently, to the perpendicular distance r⊥ from the origin.
Relationship between force (F), torque (τ), momentum (p), and angular momentum (L) vectors in a rotating system. r is the position vector.
A figure skater in a spin uses conservation of angular momentum – decreasing her moment of inertia by drawing in her arms and legs increases her rotational speed.
The torque caused by the two opposing forces Fg and −Fg causes a change in the angular momentum L in the direction of that torque (since torque is the time derivative of angular momentum). This causes the top to precess.
The angular momentum of the particles i is the sum of the cross products R × MV + Σri × mivi.
The 3-angular momentum as a bivector (plane element) and axial vector, of a particle of mass m with instantaneous 3-position x and 3-momentum p.
Newton's derivation of the area law using geometric means.

is the length of the moment arm, a line dropped perpendicularly from the origin onto the path of the particle. It is this definition,

One newton-metre is the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long.

Newton-metre

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One newton-metre is the torque resulting from a force of one newton applied perpendicularly to the end of a moment arm that is one metre long.

The newton-metre (also newton metre or newton meter; symbol N⋅m or N m ) is a unit of torque (also called ) in the SI system.

One metric horsepower is needed to lift 75 kilograms by 1 metre in 1 second.

Power (physics)

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Amount of energy transferred or converted per unit time.

Amount of energy transferred or converted per unit time.

One metric horsepower is needed to lift 75 kilograms by 1 metre in 1 second.
Ansel Adams photograph of electrical wires of the Boulder Dam Power Units, 1941–1942
In a train of identical pulses, the instantaneous power is a periodic function of time. The ratio of the pulse duration to the period is equal to the ratio of the average power to the peak power. It is also called the duty cycle (see text for definitions).

The output power of a motor is the product of the torque that the motor generates and the angular velocity of its output shaft.

Countries using the metric (SI), imperial, and US customary systems as of 2019.

International System of Units

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Modern form of the metric system and the world's most widely used system of measurement.

Modern form of the metric system and the world's most widely used system of measurement.

Countries using the metric (SI), imperial, and US customary systems as of 2019.
Arrangement of the principal measurements in physics based on the mathematical manipulation of length, time, and mass.
While not an SI-unit, the litre may be used with SI units. It is equivalent to (10 cm)3 = (1 dm)3 = 10−3 m3.
In the expression of acceleration due to gravity, a space separates the value and the units, both the 'm' and the 's' are lowercase because neither the metre nor the second are named after people, and exponentiation is represented with a superscript '2'.
Cover of brochure The International System of Units
Silicon sphere for the Avogadro project used for measuring the Avogadro constant to a relative standard uncertainty of 2 or less, held by Achim Leistner
Reverse dependencies of the SI base units on seven physical constants, which are assigned exact numerical values in the 2019 redefinition. Unlike in the previous definitions, the base units are all derived exclusively from constants of nature. Arrows are shown in the opposite direction compared to typical dependency graphs, i.e..
Stone marking the Austro-Hungarian/Italian border at Pontebba displaying myriametres, a unit of 10 km used in Central Europe in the 19th century (but since deprecated)
Closeup of the National Prototype Metre, serial number 27, allocated to the United States

The technique used by Gauss was to equate the torque induced on a suspended magnet of known mass by the Earth's magnetic field with the torque induced on an equivalent system under gravity.

Dimensional analysis and numerical experiments for a rotating disc

Dimensional analysis

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Analysis of the relationships between different physical quantities by identifying their base quantities and units of measure (such as miles vs. kilometres, or pounds vs. kilograms) and tracking these dimensions as calculations or comparisons are performed.

Analysis of the relationships between different physical quantities by identifying their base quantities and units of measure (such as miles vs. kilometres, or pounds vs. kilograms) and tracking these dimensions as calculations or comparisons are performed.

Dimensional analysis and numerical experiments for a rotating disc

For example, although torque and energy share the dimension, they are fundamentally different physical quantities.

Joule

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Derived unit of energy in the International System of Units.

Derived unit of energy in the International System of Units.

In mechanics, the concept of force (in some direction) has a close analogue in the concept of torque (about some angle):

Pound-foot (torque)

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A pound-foot (lbf⋅ft) is a unit of torque representing one pound of force acting at a perpendicular distance of one foot from a pivot point.

Flywheels have large moments of inertia to smooth out rotational motion.

Moment of inertia

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Flywheels have large moments of inertia to smooth out rotational motion.
Tightrope walkers use the moment of inertia of a long rod for balance as they walk the rope. Samuel Dixon crossing the Niagara River in 1890.
Spinning figure skaters can reduce their moment of inertia by pulling in their arms, allowing them to spin faster due to conservation of angular momentum.
Pendulums used in Mendenhall gravimeter apparatus, from 1897 scientific journal. The portable gravimeter developed in 1890 by Thomas C. Mendenhall provided the most accurate relative measurements of the local gravitational field of the Earth.
The cylinders with higher moment of inertia roll down a slope with a smaller acceleration, as more of their potential energy needs to be converted into the rotational kinetic energy.
This 1906 rotary shear uses the moment of inertia of two flywheels to store kinetic energy which when released is used to cut metal stock (International Library of Technology, 1906).
A 1920s John Deere tractor with the spoked flywheel on the engine. The large moment of inertia of the flywheel smooths the operation of the tractor.

The moment of inertia, otherwise known as the mass moment of inertia, angular mass, second moment of mass, or most accurately, rotational inertia, of a rigid body is a quantity that determines the torque needed for a desired angular acceleration about a rotational axis, akin to how mass determines the force needed for a desired acceleration.