Recent content by 1875

I came out with t = -400/600^2 but I wasnt confident with the number this came out to.

I did this and came out with 0 = 400 - 600t^2 I had difficulty transposing this for t as I kept getting discrepencies. Once I have t I can do the rest, I am not even sure if the above equation is correct for velocity.

At time t = 0 and position s = 0 a plane starts its descent into an airfield. From this point, the distance s in km as a function of time t in hours is given by; s = 300 + 400t - 200t^3 The inital velocity I have calculated to be 300 km/hr and the acceleration after 1/2 hr is 475 km/hr2. I...

I must apologise I am unaware of these rules and still struggling greatly on the last question.

for t I got t = -400/600^2 Thanks again for your help, one last thing, I am just wondering how you came to this equation of 0 = 400 - 600t^2

If you would be so kind, I missed today's lecture and do not even know where to begin. i) x = 3t^3 + 6√t + 3/t^2 ii) y = 3sin 2x + 5cos(4x)

I think I am OK on those parts its more the last question that I am having difficulty with; the time to when the velocity is zero and the distance traveled in that time?

Am I right in thinking a) 300 km/hr b) 475 km/hr2

Thank you, I completely understand it now, just would'nt click at first. I wonder while your online if you could help with; at time t = 0 and position s = 0 a plane starts its descent into an airfield. From this point, the distance s in km as a function of time t in hours is given by; s =...

exponential equation (simple??) x = Ae ^ kt initally (at t = 0) x = 0.2 and when t = 2 then x = 1.5 a) Find A and k b) Find x when t = 1.5 c) How long will it take x to decay to x = 0.01 Really struggling, any help would be greatly appreciated.