How Do You Calculate Force and Direction in Particle Motion Problems?

[Rose15]

A 0.340 kg particle moves in an xy plane according to x(t)=-15.00+2.00t-4.00t^3 and y(t)=25.00+7.00t-9.00t^2, with x and y in meters and t in seconds. At t=0.700s, what are a.) the magnitude and b.) the angle (relative to the positive direction of the x axis) of the net force on the particle, and c.) what is the angle of the particle's direction of travel.

-My first post! I got stuck on this question because I wasn't sure exactly where to start because it doesn't seem to really follow the format of any of the questions we have done in class and so I am having a hard time understanding it.

 

[slider142]

The first two questions are about the net force on the particle. What is the definition of net force ?

 

[haruspex]

What is the definition of net force ?

I suspect that's not what you meant to ask. The definition of net force is of no interest here. It is the consequence of the net force that matters, i.e. Newton's second law.

 

[cnh1995]

A 0.340 kg particle moves in an xy plane according to x(t)=-15.00+2.00t-4.00t^3 and y(t)=25.00+7.00t-9.00t^2, with x and y in meters and t in seconds. At t=0.700s, what are a.) the magnitude and b.) the angle (relative to the positive direction of the x axis) of the net force on the particle, and c.) what is the angle of the particle's direction of travel.

-My first post! I got stuck on this question because I wasn't sure exactly where to start because it doesn't seem to really follow the format of any of the questions we have done in class and so I am having a hard time understanding it.

You might be asked by a mentor to use the homework template and show your attempt first.
Basic vector addition and F=ma_net is all you need.

 

[haruspex]

You might be asked by a mentor to use the homework template and show your attempt first.
Basic vector addition and F=ma_net is all you need.

F_net=ma