Recent content by coggo8

I fully understand the concepts involved. I am merely trying to think of alternative ways to solve this problem. I will find help with this elsewhere. You D H, as a 'mentor', are very condescending. A mentor is supposed to stimulate thought and be suggestive. I don't find this "Please provide...

Also Part (c) asks me to find the speed of the exhaust gases.

Thrust is measured in Newtons (N). Thrust is a force, that is why we measure it in Newtons. Don't ask why I said ms-1 earlier. Also T>3.4*10^6 would be incorrect. Because the downward force of the vehicle is actually (3.4*10^6)*9.8 = 3.332*10^7 N ∴ T>3.332*10^7 N

I have not left any information out. Here is the statement. "An Apollo launch vehicle has a total mass of 3.4*10^6 kg at lift-off. The first stage contains 2.0*10^6 kg of propellant (fuel and oxygen) which is consumed at a rate of 1.4*10^4 kg/s." I provided all of this information at the...

I have considered all of the above :( Surely either acceleration or thrust could be calculated using fuel consumption rate, fuel weight and mass of the rocket?

Nope, no lift-off acceleration (otherwise this question would be simple), and it would be strange for them to expect me to use a random number greater than the weight because if I were to do that, I would have to use an infinitely close number?! Especially considering this is an assignment and...

I see what you mean, so I could answer this question quite simply with; T>3.4*10^6? However I have just read part (b) of the question which says 'If that thrust is sustained, find the time over which the first stage operates and acceleration of the vehicle at that time.' So, I can find how...

Homework Statement Here is the data I have been given; mass = 3.4*10^6 kg (at lift off) mass of first stage propellants = 2.0*10^6 propellant consumption rate = 1.4*10^4 kg/s g = 9.8 m/s/s Find the thrust of the engines at lift-off. Homework Equations a = T-mg/m The Attempt at...

Of course, I hadn't thought of quadratics (I am just learning kinematics via correspondence). Thank you for your help!

Which of these should the equation look like? -150 = 84.85*t + 1/2(-9.8)*t^2 or Δy = 84.85*5.53 + 1/2(-9.8)*(5.53)^2 With the first I have an issue because I am unable to find a value for t and my value for Δy (-150) will also be incorrect as the projectile is now being fired at an angle...

Homework Statement My problem consists of two parts, the first being how far from the top of a cliff will a projectile (fired from a cannon) land with a velocity of 120 ms^-1, fired horizontally from cliff height of 150m. The second part is where I am struggling, the cannon is now aimed 45°...