Position,Velocity,Acceleration!!
Position,Velocity,Acceleration!!
(OP)
I have a problem here.Suppose a particle starts from the origin , x=0, with no velovity but with a positive acceleration.Under this acceleration the particle gains a positive velocity and moves in a positive direction.Can anyone explain this physically.
I am not able to physically imagine a particle with zero velocity(rate of change of displacement) and positive accleration(rate of change of velocity)
I am not able to physically imagine a particle with zero velocity(rate of change of displacement) and positive accleration(rate of change of velocity)





RE: Position,Velocity,Acceleration!!
RE: Position,Velocity,Acceleration!!
so velocity=ds/dt=(2-0)/(2-0)=1cm./sec.
This is at the end of 2 secs.Can u explain like this with regard to acceleration?Please
RE: Position,Velocity,Acceleration!!
If acceleration is constant,
Acceleration at time t A(t) = Ao
Velocity at time t V(t) = Ao *t + Vo
Position at time t X(t) = (Ao*t^2)/2 + Vo*t + Xo
For your example:
Initial acceleration Ao = gravity = 9.81 m/s^2, initial velocity Vo = 0, & initial position Xo = 0
V(2) = 9.81*2 + 0 = 19.62 m/s & X(2) = (9.81*2^2)/2 + 0*2 + 0 = 19.62 m
V(3) = 9.81*3 + 0 = 29.43 m/s & X(3) = (9.81*3^2)/2 + 0*3 + 0 = 44.15 m
V(4) = 9.81*4 + 0 = 39.24 m/s & X(4) = (9.81*4^2)/2 + 0*4 + 0 = 78.48 m
And so on.
RE: Position,Velocity,Acceleration!!
Though I couldn't understand the purpose of this question, I really liked your spirit. (of not bothering about academic vs professional) This attitude does keep this site lively.
Cheers,
Truth: Even the hardest of the problems will have atleast one simple solution. Mine may not be one.
RE: Position,Velocity,Acceleration!!
RE: Position,Velocity,Acceleration!!
You could put in your thoughts too(in a physical sense) to the question.Thanks very much cause i started feeling a bit down before your comment.
RE: Position,Velocity,Acceleration!!
As my Grandad said:
There's no such thing as a stupid question, just stupid answers.
RE: Position,Velocity,Acceleration!!
Just about questions:
Your Grandad was a wise person!
I was always feeling uneasy to pose questions till the other day when I saw: Bad question is the one that was not asked.
RE: Position,Velocity,Acceleration!!
RE: Position,Velocity,Acceleration!!
RE: Position,Velocity,Acceleration!!
RE: Position,Velocity,Acceleration!!
The force due to gravity has the effect of acceleration on a mass when there is no opposing force on that mass.
A mass in a gravitational field results in a force. This is a concept that man has still not conquered!
It requires force (or net force to be correct) to accelerate a mass.
I always find it entertaining to consider the action of the earth when a mass is released. Every force has an equal and opposite reaction.....when you release a mass and let it fall by gravity, the earth has to move towards it to balance the forces (an immeasurably small amount, mind).
RE: Position,Velocity,Acceleration!!
Think about what you just said.
Then go back to Physic 101..........
Remember...
"If you don't use your head, your going to have to use your feet."