[Note:You Must Be Interested In Physics.]

*If you agree with a statement, given an example. If you disagree, give an explanation.*

[Try To Be As Elementary As Possible.]

Can a body have zero velocity and still be accelerating?

Can a body have a constant speed and still have varying velocity?

Can a body have a constant velocity and still have varying speed?

Can an object have eastward velocity while experiencing a westward acceleration?

Can the direction of the velocity of a body change when its acceleration is constant?

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## Comments

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TopNewestThis is basically Newton's Laws in action. Just think of a heavy crate sliding on a floor. We know from the second law that $a=\frac{F_{net}}{m}$. And acceleration is defined as the rate of change of velocity (yes, that includes direction). So, a crate can be sliding or not sliding, and at all times you can be pushing it, giving it an acceleration. You may not change how fast its moving, but you may change its direction of motion.

## 3 eh is sort of complicated;

For the most part, the answer is

NO. This is because velocity is (simply) defined as speed with direction; so, if speed varies, so does velocity.If we analyze the two parameters in terms of their definitions and take a further look by looking at their integrals, then incorporating some knowledge of quantum mechanics we can have a theoretical "yes" to that:

While in the purely mathematical world the answer is still no, in the real world, with weird relativity laws and quantum mechanics plethora we could squeeze something out. For example, a virtual particle under an infinite timewarp, say near a black hole, when observed from the same frame of reference, may skip between 5D branes in under the planck time, but in the 4D reference only travel 1$c$s, but, as far as the total distance traveled goes, its speed is greater while its velocity, or net speed with direction may remain the same.

Dunno. Honestly I thought about this for like an hour and couldn't come up with anything better ;P

Let's just say

NOand end the day there :)s

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Ok. & Wow!

I don't know anything about quantum mechanics.You could probably post some articles explaining quantum to those who have null knowledge in that field [like the article at JohnExplainsTheUniverse]

I didn't notice that Arusimha had changed his comment and included reasons as well as example [cuz at 1st he didin't]

in 4 we can also have spring motion,can't we??? and oscillatory also.

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eh we can have anything. if we have a crate sliding left on a floor that has friction, it is already decelerating - or, accelerating towards right - or, losings its leftward velocity and gaining rightward. Now if instead of friction we had something else pushing it at all times, then after the crate stopped it would continue accelerating towards right and gain a positive velocity towards right.

-oh, and the quickest way to become a quantum mechanics Big G is to watch THIS playlist - in order.

You can take it easy one a day - or one a week.

Enjoy :)

s

ss

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Ok i will watch them.

Thanx @John Muradeli .

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If you are

answering 'No', pleaseexplain 'why No?'If you are

answering 'Yes', then please'Give An Example.'Log in to reply

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5th one was good

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