I don't know how to go about this problem.
A 3 kg object is moving in a plane, with its x and y coordinates given by $$x=5t^{2}-1$$ and $$y=3t^{3}+2$$, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object as a function of time. Evaluate this expression at t=2s.

Question

I don't know how to go about this problem.
A 3 kg object is moving in a plane, with its x and y coordinates given by $$x=5t^{2}-1$$ and $$y=3t^{3}+2$$, where x and y are in meters and t is in seconds. Find the magnitude of the net force acting on this object as a function of time. Evaluate this expression at t=2s.

anonymous · Answer

Take derivative twice. This will give u acceleration. Force = mass * acceleration

kkutie7 · Answer

i need an expression... that doesn't work

anonymous · Answer

follow the attachment...
the acceleration is uniform as it doesn't include any time variable(after differentiation)
so, net force acting on this object doesn't change as a function of time...