Tag Archive: speed

Nov 15

Does gravity travel instantaneously?

Does gravity travels instantaneously? Or it travels equal to the speed of light.

Answer:

No clear answer now. If we believe in the Theory of relativity, Gravity (Gravitational Waves travel with the same

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Permanent link to this article: http://www.plustwophysics.com/does-gravity-travel-instantaneously/

Nov 09

Speed of sound

Why sound travels faster in humid air than normal air as humid air is denser than normal air? (Akash asked)

Answer:

The speed of sound in a medium is inversely proportional to the square root of its

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Permanent link to this article: http://www.plustwophysics.com/speed-of-sound/

Nov 01

What would happen if the Earth stopped rotating?

The speed of an object on earth’s surface near equator is approximately is 1670 kilometers/hour. So, if the earth stops rotating suddenly,  the objects on the

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Permanent link to this article: http://www.plustwophysics.com/what-would-happen-if-the-earth-stopped-rotating/

Oct 30

Kinetic Energy – Numerical Problem

a running man has half the kinetic energy that a boy of half his mass has.the man speed up by 1m/s and then has the same kinetic energy as the body. what were the original speeds of man and boy?

Permanent link to this article: http://www.plustwophysics.com/kinetic-energy-numerical-problem/

Oct 07

A Numerical Problem from Kinematics

A car starts motion from rest at uniform acceleration of 2m/sec 2 for 3 seconds, and then it maintains a constant speed for 2 seconds.Then the breaks are used to decelerate the car uniformly to rest

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Permanent link to this article: http://www.plustwophysics.com/a-numerical-problem-from-kinematics/

Sep 15

What is twin paradox?

TWIN PARADOX is a paradoxical situation coming in while explaining the theory of relativity. “Time dilation” is one of the important consequences of relativity. It says that if a body is moving with relativistic speeds, time will dialate ...

Permanent link to this article: http://www.plustwophysics.com/what-is-twin-paradox/

Sep 13

More problems coming in; Try to answer now!

Stuti posted these: a particle is thrown with  any velocity vertically upward. the distance traveled by particle in last sec of ascent is 1)g 2)g/2 3)g/4 4)cant be calculated a ball is dropped from a bridge of 122.5 metre above a river. after ball h...

Permanent link to this article: http://www.plustwophysics.com/more-problems-coming-in-try-to-answer-now/

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