(adsbygoogle = window.adsbygoogle || []).push({}); 1.The position vector of a 3000N helicopter is given by:

r=(.02 m/(s^3))(t^3)i + (2.2m/s)tj - (0.06 m/(s^2))(t^2)k

Find the net force on the helicopter at t = 5s.

2. I really have no clue where to begin.

3. I started doing this:

r= (.02m/(s^3))(5s^3)i + (2.2m/s)(5s)j - (.06m/(s^2)*(5s)^2k

r= 2.5mi + 11m + 1.5m

then I drew a 3d graph with each axis labeled and two right triangles but have no clue

where to go from here.

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# Homework Help: Find the net force with the given position vector

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