A Rocket R is fired from ground with inital speed s to the horizontal at an angle . There is a resistive force F=-mkv where m is the mass and v is the vector (v1,v2) and K is a constant. Show the equations of motion are
and
My answer. First in the horizontal direction there is no resultant force so I don't get it
First I see why you are confused I factored out the minus signs in the force but forgot to put them in the final answer. Yes I had a typo and have edited the above post.
The initial conditions are implied not explicit given.
Assumption 1 Since we are free to setup our own coordinate system lets start the rocket at the origin. That would give the initial conditions.
Also since we are launching the rocket its initial velocity should also be zero