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aslamalaikumI kinda wanna confirm something. Why does the gravitational potential has a neg sign in it's formula?!
xhizors
Jazak Allah khair.
Wsalaam, Thanks, but i never mentioned a neg sign for a body falling towards the earth?! as per ur example a Ball. :/isn't it that gravity acts downward so it'll b positive?!aslamalaikum
look u have to consider velocity of body going up as poisitve and body going down as negative.
case 1.
when u throw a ball upwards its speed decreases to zero so u would conclude that there is deceleration which means negative accleration .
case 2
when the ball from that highest point reached now goes downward u might consider as acceleration positive one but no its wrong.
velocity will increase but it will be negative so again negative acceleration.
now u would conclude that g is always negative
a=v-u/t and as V final velocity will always be negative for a body moving downwards so the acceleration will be negative.. in alevels u do have to give positive and negative signs its not o levelsWsalaam, Thanks, but i never mentioned a neg sign for a body falling towards the earth?! as per ur example a Ball. :/isn't it that gravity acts downward so it'll b positive?!
u know that final velocity will be greater than u and it will be negative so acceleration will also be negativea=v-u/t and as V final velocity will always be negative for a body moving downwards so the acceleration will be negative.. in alevels u do have to give positive and negative signs its not o levels
So, u mean when for eg: the ball is thrown up, the neg sign is 'cause of the deceleration and when it falls down, the neg is 'cause of the velocity (as we took it negative for downward)u know that final velocity will be greater than u and it will be negative so acceleration will also be negative
I believe it's a graph with a square wave form due to saturation, so when V2 is greater than V1 it's positive saturation, and when V1 is greater than V2 it's negative saturation. Hence resulting in a graph with a square wave form.
none replied.........plz someone explain use of base station at both ideal and active time of cell phones?
RMS (root mean square) voltage is the equivalent DC voltage that produces the same power dissipation in a load (heating effect in a resistor) or the same power transfer in a conductor. R,M,S voltage is the AC voltagewhat is root mean square value can anyone please describe?
and what about the starting point!!I believe it's a graph with a square wave form due to saturation, so when V2 is greater than V1 it's positive saturation, and when V1 is greater than V2 it's negative saturation. Hence resulting in a graph with a square wave form.
Hope that helped.
b/c work gets out whenever works gets out we place a -ve sign !I kinda wanna confirm something. Why does the gravitational potential has a neg sign in it's formula?!
xhizors
Jazak Allah khair.
thanks. :')b/c work gets out whenever works gets out we place a -ve sign !
M/j 2012, O/N 2012, Mj/ON 2011.Can anyone suggest which question papers I should practice for the last couple of hours that I've got?
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