http://www2.uah.es/jmc/ai14.pdf
On page 2 of the above pdf there is an example in a box with title 'Acceleration'
which states that there is a difference between a man pulling on a rope with 600N force and an iron weight of 60Kg (g = 10) tied to the rope. The difference being that once the...
and considered doing this with just the switch turned off. After turning off the switch I checked the voltage with a meter in A/C mode. It was 140V which I thought a tad high. When I turned the switch on the reading was 230V as expected (in the UK). So I turned off the lighting circuit at the...
Suppose you have a frictionless and perfectly balanced conveyor belt going into space (and back). The belt is driven by a motor on earth. Suppose you want to send a person who weighs 100kg into space and you boost them onto the conveyor belt at 1m/s with the conveyor belt running at 1m/s (the...
So then the rate at which the rocket gains kinetic energy DECREASES ?
But the rocket's acceleration INCREASES ?
And the explanation for both of these is that the rocket's mass is DECREASING ?
E.
No. I quoted what you gave for the EXHAUST GAS ONLY. Please re-read my question. I know my questions APPEAR stupid to you because you know the subject inside out, but I genuinely am just trying to understand this one bit at a time.
E.
Okay. I've worked through your math and am happy enough with it.
In order to get some insight I started plugging in numbers.
It appears that the faster the rocket is going the more energy is transferred to the exhaust gas
\frac 1 2 \Delta m v_r^2 + \Delta m v_r\cdot v_e + \frac 1 2...
Originally I thought that constant rate of energy supply would provide constant force so I was confused as to why energy out (KE) was proportional to v^2. Then as result of answers given here I was persuaded that a constant force would not result which explained why KE was not proportional to v...
You are a bit over my head here, but when you say 'Since the mass is constant, the change in vehicle velocity is also proportional to energy transferred to the vehicle', is there a constant force on the vehicle ?
E.
No problem. What you explained earlier made sense. But I am confused again as I didn't follow DH's argument. If now 'Constant rate of fuel production does produce a constant force' I am back to square one. Can you explain DH's argument for me ?
E.
Thank you for your answer. I accept what you say as a fact. So my confusion is to do with why a constant rate of fuel consumption does not produce a constant force. Can you explain this please ?
E.