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7 Oct 2009 19:24:32 IST

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The velocity of a particle is towards west at an instant. Its acceleration is not words west, not towards east, not towards north and not towards south. Give an example of this type of motion.

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Vijay Pal

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7 Oct 2009 19:29:08 IST

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it is the case when particle is moving with constant velocity hence there is no acceleration and no direction of acceleration.

Deepak Aggarwal

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7 Oct 2009 19:33:36 IST

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ny other case in which it has acc. bt not in east, west, north or south?

djdylan2000. bits goa eee

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7 Oct 2009 19:48:50 IST

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a projectile thrown to the west! Acceleration will be downward, not towards N, S, E or W. At the topmost pt, the inst velocity will point exactly west.

Deepak Aggarwal

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8 Oct 2009 10:24:30 IST

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In a projectile acc. is downwards i.e. towards south.

djdylan2000. bits goa eee

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8 Oct 2009 10:43:08 IST

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How is down southwards???

Down means towards the centre of the earth!

ghfh bgd

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8 Oct 2009 18:06:12 IST

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give an impusle to a body towards west and delete every other object in this universe so that no external force is acting . you will get the example

Deepak Aggarwal

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8 Oct 2009 21:10:55 IST

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acceleration at topmost point is downwards and even perpendicular to the velocity vector. That's totally right dat it is towards the centre of earth. Bt from where, from above. so a vector from above to centre of earth definately points towards south only. Plz correct if i am wrong somewhere!

djdylan2000. bits goa eee

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8 Oct 2009 21:20:33 IST

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Dude, face the north and spread ur arms apart.

Your front faces north

your back faces south

your right arm points east

your left arm points west

Now look at your feet. your eyes will be pointing towards the centre of the earth. Its 3D, so I cudnt draw it in a 2D figure.

djdylan2000. bits goa eee

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8 Oct 2009 21:22:14 IST

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another eg: a cube has 6 faces. U can assign N, S, E and W to only 4 of the faces. sides 5 and 6 will face 'up' and 'down'

Deepak Aggarwal

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8 Oct 2009 21:24:04 IST

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dude but i suppose projectile we r discussing on is a 2-D motion ( motion in a plane ) right?

wHaT tHe F

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8 Oct 2009 22:59:18 IST

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wy do u need such an example??take a molecule man .... mg is practically = 0 and during derivation of pressure exerted by gas molecules ...molecules are considered as moving with constant velocity ...so there is ur example ...a gas molecule as simple as dat!!!!!!

spiderman

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8 Oct 2009 23:02:58 IST

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piece of ice block sliding(towards west) on a perfectly smooth surface..uniform motion with zero accleration components..

Anshul Rai

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9 Oct 2009 17:48:09 IST

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Just look at this figure, you'll get it.

This point is a car decelerating while moving. Velocity is westwards, and there are both tangential and centripetal accelerations, so its acceleration is somewhere between East and South.

Hope this example is sufficient.

Anshul Rai

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9 Oct 2009 17:50:29 IST

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I took just a specific case, you may take any different permutation of the data.

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