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2. Velocity - Wikipedia

   en.wikipedia.org/wiki/Velocity

   Speed, the scalar magnitude of a velocity vector, denotes only how fast an object is moving, while velocity indicates both an object's speed and direction. [3] [4] [5] To have a constant velocity, an object must have a constant speed in a constant direction. Constant direction constrains the object to motion in a straight path thus, a constant ...

3. Work (physics) - Wikipedia

   en.wikipedia.org/wiki/Work_(physics)

   For convenience, consider contact with the spring occurs at t = 0, then the integral of the product of the distance x and the x-velocity, xv x dt, over time t is ⁠ 1 / 2 ⁠ x 2. The work is the product of the distance times the spring force, which is also dependent on distance; hence the x 2 result.

4. Speed - Wikipedia

   en.wikipedia.org/wiki/Speed

   Speed is the magnitude of velocity (a vector), which indicates additionally the direction of motion. Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, in the US and the UK, miles per hour (mph).

5. Motion - Wikipedia

   en.wikipedia.org/wiki/Motion

   Light moves at a speed of 299,792,458 m/s, or 299,792.458 kilometres per second (186,282.397 mi/s), in a vacuum. The speed of light in vacuum (or ) is also the speed of all massless particles and associated fields in a vacuum, and it is the upper limit on the speed at which energy, matter, information or causation can travel. The speed of light ...

6. Equations of motion - Wikipedia

   en.wikipedia.org/wiki/Equations_of_motion

   There are two main descriptions of motion: dynamics and kinematics.Dynamics is general, since the momenta, forces and energy of the particles are taken into account. In this instance, sometimes the term dynamics refers to the differential equations that the system satisfies (e.g., Newton's second law or Euler–Lagrange equations), and sometimes to the solutions to those equations.

7. Friction of distance - Wikipedia

   en.wikipedia.org/wiki/Friction_of_distance

   Of the many (but finite) possible routes through the road network, the one with the shortest distance passes through residential neighborhoods with low speed limits and frequent stops. An alternative route follows a bypass highway around the neighborhoods, having a significantly longer distance, with much higher speed limits and infrequent stops.