Recent content by Champdx

Should it be W=mg+ma?

You can use this formula S=ut+1/2at^2 and take a=9.8m/s^2. Since it is falling to ground the acceleration is positive.

Is there any way to solve this question by calculation? Thanks.

Actually i know that the answer x=2 but how am i suppose to prove it?

Homework Statement 2^x+3^x=13, x=2. How do i prove it? The Attempt at a Solution i did this x log 2 + x log 3 = log 13 x(log 2 + log 3)=log 13 x(0.301+0.477)= 1.11 0.778x=1.11 x=1.43

If deceleration is given instead of acceleration can i find the force ?

If you say they haven't discover the time machine. Is that means time machine is not in existence? This is because far in future there should be an existence of time machine, this is what been predicted by the physicist [in the present time]. This only could be a myth in my point of view. I'm...

If somebody in future discovered the time machine, why didn't they come back in time [to the present] to visit us?

Homework Statement f(x)=x+(5/x), how do i find f^-1(x)?

f=ma 0.23N=0.0513a a=4.48m/s^2 v^2=u^2+2as v^2=(2)^2+2(4.48)(40) v^2=360 v=19m/s s=ut+1/2at^2 0.92=(19)t+1/2(9.8)t^2 4.9t^2+19t-0.92=0 t=0.05s Correct me if I'm wrong Thanks

Why do we relate mass and velocity to find momentum ? Champdx Thanks