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If the airplane has a rest mass of $20,000 \mathrm{kg},$ what is its rela-tivistic mass when moving at 180 $\mathrm{m} / \mathrm{s} ?$A. 8000 $\mathrm{kg}$B. $12,000 \mathrm{kg}$C. $16,000 \mathrm{kg}$D. $25,000 \mathrm{kg}$E. $33,300 \mathrm{kg}$

$$=25000 \mathrm{kg}$$

Physics 101 Mechanics

Chapter 27

Relativity

Gravitation

Rutgers, The State University of New Jersey

University of Washington

Hope College

Lectures

03:55

In physics, orbital motion is the motion of an object around another object, which is often a star or planet. Orbital motion is affected by the gravity of the central object, as well as by the resistance of deep space (which is negligible at the distances of most orbits in the Solar System).

03:18

Sir Isaac Newton described the law of universal gravitation in his work "Philosophiæ Naturalis Principia Mathematica" (1687). The law states that every point mass attracts every single other point mass by a force pointing along the line intersecting both points. The force is proportional to the product of the two masses and inversely proportional to the square of the distance between them.

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Yeah. The plane in this problem initially has a mass of 20,000 kilograms. If it's moving at a speed of 180 meters per second than and camera is gonna pee 20,000 divided by the square root of one minus 180 over 300 squared. In our alternate universe, the speed of light is 300. So this is what a gamma factor with the quake, and this comes out to 25,000 kilograms.

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