(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 2.60 kilogram mass is moving in a plane, with its x and y coordinates given by x = 5.40t^{2}- 1.30 and y = 2.75t^{3}+ 1.80, where x and y are in meters and t is in seconds. Calculate the magnitude of the net force acting on this mass at t = 2.10 seconds.

2. Relevant equations

Our teacher has been making us use the position update formula and the momentum principle:

[tex]\Delta[/tex]r=V_{avg}[tex]\Delta[/tex]t

[tex]\Delta[/tex]P=F_{net}[tex]\Delta[/tex]t

3. The attempt at a solution

I can figure out the velocity at a given point in both the y and x directions by finding the derivative:

dx/dt=8.4t

dy/dt=8.25t^{2}

But I don't know how to apply this. I really don't know where to start.

Edit: sorry, dx/dt should be 10.8t

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# Homework Help: Finding magnitude of net force

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