Recent content by johnboy14

I see I made a substitution mistake in my formula I devided by XL thanks for the help

How did you get that

Do yous get 21.7 for L

I know that the formula for reactance is Xl = 2(pi) f L How do I find L that's the just of what I want.

Homework Statement a non inductive resistor passes a current of 20A rms, when connected to a 100v rms supply (50HZ). When connect in series with a pure inductor across a 230v supply the combination draws a current of 15A calculate impedance of the circuit, inductance of the inductor...

should the answer for velocity be dx/dt = 4 - 1/(1-t) & acceleration be d2x/dt2 = -1/(1-t)^2

I'll do it your way. because I don't really understand this 3-t business, thanks for the help and patience.

does it matter which you use. 1-t or 3-t. I think its a typo, can't get hold of him to ask him. But I started it in class and used 3-t. Let this be a lesson to finish what you start.

I've shown you my working for the question like you asked, and you have told me something is wrong with it. Not asking you to do the whole question I'm asking you to tell me where I have gone wrong with the part on its initial velocity. Isn't that what this forum is for.

show me the question as you would do it and I will put it to him.

absolutely sure. When I was sitting talking though this with him he used 3 - t. Now I'm confused. Using the function of the function rule change 1-t into 3-t.

i asked my lecture the same thing and he told me what I told you. what about the acceleration

u is equal to 3-t. does that answer your question

Homework Statement At any time t seconds the distance x metres of a particle moving in a straight line from a fixed point is given by x = 4t + ln(1-t). Using the function of a function rule, determine A.) the initial velocity and acceleration The Attempt at a Solution I had...

Not with you? I think you have to intergrate it but Not sure how many times though.