Force

Influence that can change the motion of an object.

- Force

500 related topics

Thrust

Thrust is a reaction force described quantitatively by Newton's third law.

Drag (physics)

In fluid dynamics, drag (sometimes called air resistance, a type of friction, or fluid resistance, another type of friction or fluid friction) is a force acting opposite to the relative motion of any object moving with respect to a surrounding fluid.

Torque

Newton-metre .

caption = Relationship between force F, torque τ, linear momentum p, and angular momentum L in a system which has rotation constrained to only one plane (forces and moments due to gravity and friction not considered).

Pressure

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

Stress (mechanics)

In continuum mechanics, stress is a physical quantity that expresses the internal forces that neighbouring particles of a continuous material exert on each other, while strain is the measure of the deformation of the material.

Euclidean vector

Geometric object that has magnitude (or length) and direction.

Vectors play an important role in physics: the velocity and acceleration of a moving object and the forces acting on it can all be described with vectors.

Dynamics (mechanics)

Dynamics is the branch of classical mechanics that is concerned with the study of forces and their effects on motion.

Acceleration

Accelerating in the direction of travel.

In classical mechanics, for a body with constant mass, the (vector) acceleration of the body's center of mass is proportional to the net force vector (i.e. sum of all forces) acting on it (Newton’s second law):

Proportionality (mathematics)

Called the coefficient of proportionality or proportionality constant.

The force, acting on a small object with small mass by a nearby large extended mass due to gravity, is directly proportional to the object's mass; the constant of proportionality between the force and the mass is known as gravitational acceleration.

Inertia

Resistance of any physical object to a change in its velocity.

An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed when no forces act upon them.

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