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No, initial speed given.Thanks btw, Why is u=0?
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No, initial speed given.Thanks btw, Why is u=0?
Do we always assume u to be 0 if it is not mentioned in the question?No, initial speed given.
Is this a full question ?? I think something is missing.Its * 60N is applied to the trolley..... Answer : C
IF you can find initial speed, or if u required to get other quantity, then do not assume U as ODo we always assume u to be 0 if it is not mentioned in the question?
I d k this one I am in hurry, catch u later. I'll solve it, Its easyYup it is. The part where it says retarding force of "60 N is applied to the trolley." is a bit blurred
No need. I got it.It's okay, bro. Someone else will extend their helping hand. * you're my genius though
wohoo! thanksNo need. I got it.
a = F / m => a = -60N /30kg = -2m/s^2 (the force and acceleration are negative b/c the force opposes motion and the trolley slows down)
a = (change is velocity) / time => -2m/s^2 =[ v(f) - 3.0m/s] / 0.5s. Solving for V(f) we have: v(f) = 2m/s
Npwohoo! thanks
Looks like i am late XD
sorry Thought blocker but i dont take bio
It was a mistake tag, it was an answer for unique111than who tagged me sorry let me see again
Can somebody help me with this? It seems quite easy, cause its in number 5, but i couldn't figure out where to start from. Much help appreciated.
V2=U2+2as
V2=0+2*0.2*1000=400 'Change 1km to m'
V=Root of 400
V=20m/s
Thanks for correctionactually v square would be zero as it is the final speed, and you are finding the initial speed which is u.. You got the right answer in this case, but it could just as well have been wrong. u is initial and v is final
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