# Newton's Second Law

1. Oct 9, 2007

### saber1357

1. The problem statement, all variables and given/known data
A 3.00kg object is moving in a plane, with its x and y coordinates given by x=5(t^2)-1 and y = 3(t^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 at t=2.00s

2. Relevant equations

F = ma

3. The attempt at a solution

Can I take the second derivative of both those function to get the x and y coordinates of acceleration, plugging in t and then solving for the vector?

2. Oct 9, 2007

### learningphysics

yup. that gives acceleration. Then force is just $$m\vec{a}$$

3. Oct 9, 2007

Thank you <3