How Do You Calculate the Net Force on a Moving Object Using Newton's Second Law?

[saber1357]

Homework Statement

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

Homework Equations

F = ma

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?

 

[learningphysics]

Homework Statement

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

Homework Equations

F = ma

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?

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

 

[saber1357]

Thank you <3