Vector Equation Line: An object was fired from position vector q = (10, -10,20)...

[helloWorld600]

I have this question,

An object was fired from position vector q = (10, -10,20) in the direction given by v = (20,-30,10), calculate coordinates of the point after time t = 3.

this is what I did:

r=q+vt
r=(10,-10,20)+3(20,-30,10)
r=(10,-10,20)+(60,-90,30)
r=(70,-100,50)


is this correct?

 

[Deleted member 4993]

I have this question,

An object was fired from position vector q = (10, -10,20) in the direction given by v = (20,-30,10), calculate coordinates of the point after time t = 3.

this is what I did:

r=q+vt
r=(10,-10,20)+3(20,-30,10)
r=(10,-10,20)+(60,-90,30)
r=(70,-100,50)


is this correct?

Is this object travelling with constant velocity (i.e. a(cceleration) = 0)?

 

[helloWorld600]

Is this object travelling with constant velocity (i.e. a(cceleration) = 0)?

There is no acceleration

 

[ksdhart2]

Generally speaking, most math problems at this level greater simplify things and ignore a lot of real world factors such as gravity, wind resistance, etc. If what you quoted in your initial post was exactly, quoted word-for-word, what the problem text said, then I think it's safe to assume you're meant to work with a constant velocity. If that's the case, that would make your answer correct. If you wish, you could ask your teacher for clarification.