Asked by anonymus
A rocket engine uses fuel and oxidizer in a reaction that produces gas particles having a velocity of 1380 ms-1. The desired thrust is to be 195000 N.
1-What must be the fuel/oxidizer consumption rate (in kg s-1)?
2-f the initial weight of the rocket is 125000 N, what is its initial acceleration?
3-What are the weight and acceleration of the rocket at t = 15.0 s after ignition?
4-What are the weight and acceleration of the rocket at t = 20.0 s after ignition?
Please help all my classmates doesn't know how to solve this and its due tomorrow *face crying*
1-What must be the fuel/oxidizer consumption rate (in kg s-1)?
2-f the initial weight of the rocket is 125000 N, what is its initial acceleration?
3-What are the weight and acceleration of the rocket at t = 15.0 s after ignition?
4-What are the weight and acceleration of the rocket at t = 20.0 s after ignition?
Please help all my classmates doesn't know how to solve this and its due tomorrow *face crying*
Answers
Answered by
bobpursley
force=massfuelrate*velocity
massfuelrate= forcedesired/velocty
Initial,it has to operate against gravity.
Thrust=mg+ma=m(9.8+a)
solve for a. mass=initialweight/9.8
3. figure the mass lost in 15 sec(massrate*time)
then do 2 over with the new weight
3.same thing again.
massfuelrate= forcedesired/velocty
Initial,it has to operate against gravity.
Thrust=mg+ma=m(9.8+a)
solve for a. mass=initialweight/9.8
3. figure the mass lost in 15 sec(massrate*time)
then do 2 over with the new weight
3.same thing again.
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