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Archive for January, 2017

Is an object doing work by falling?

Posted by khuram on January 13, 2017

Is an object doing work by falling? by Khuram Rafique

Answer by Khuram Rafique:

Precisely and technically … NOT.

Term ‘work’ should be applied only against resistance force … like moving in air or friction or upward in gravity.

Otherwise there is no meaning in concept of work. According to first law, any moving object should keep on doing work for ever!

Is an object doing work by falling?

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What would happen If there was no equal and opposite reaction?

Posted by khuram on January 2, 2017

What would happen If there was no equal and opposite reaction? by Khuram Rafique

Answer by Khuram Rafique:

There would be no inertia. Everything could be made to move any time with any little force.

Any moving object could be forced to stop regardless of size or mass of that moving object.

What would happen If there was no equal and opposite reaction?

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What is Einstein’s actual contribution to science and humanity?

Posted by khuram on January 2, 2017

What is Einstein’s actual contribution to science and humanity? by Khuram Rafique

Answer by Khuram Rafique:

Science was perplexed at his time. He gave science (right or wrong whatever) direction.

Classical ideas of relative motion were defied by the electromagnetic dynamics. So science was in state of confusion on this issue.

Science was also confused regarding existence or non-existence of aether as experiments had failed to detect any aether.

Then Einstein came and asserted that light speed is constant and this speed is independent of motion of reference frame.

And there was no need of aether.

He gave right or wrong justifications and supported them with clever mathematics.

Science, at least, found a clear direction for itself.

What is Einstein’s actual contribution to science and humanity?

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