# Help AP physics C mechanical

• Daretodaredar
In summary, the position of a moving particle in an xy plane is given by r=(2.00(t^3) -5t)î+ (6.00-7.00(t^4) )j, with r in meters and t in seconds. In this problem, we are asked to calculate the position, velocity, and angle of the particle at t=25 seconds, using unit notation. We also need to show our understanding of the relationship between position and velocity. To solve this problem, we will need to convert from rectangular to polar notation and use relevant equations to find the angle. It is important to put in effort and show our understanding in order to receive help with our schoolwork.

## Homework Statement

the position "r" of a moving particle moving in an xy plane is given by r=(2.00(t^3) -5t)î+ (6.00-7.00(t^4) )j with r in meters and t in seconds. In unit notation calculate:
A) R
B) Velocity
C) R when t is 25 seconds
What is the able between the positive direction of the x-axis and a line tangent to its path at t=25 s

## Homework Equations

I have no clue what to do!

## The Attempt at a Solution

Daretodaredar said:

## Homework Statement

the position "r" of a moving particle moving in an xy plane is given by r=(2.00(t^3) -5t)î+ (6.00-7.00(t^4) )j with r in meters and t in seconds. In unit notation calculate:
A) R
B) Velocity
C) R when t is 25 seconds
What is the able between the positive direction of the x-axis and a line tangent to its path at t=25 s

## Homework Equations

I have no clue what to do!

## The Attempt at a Solution

Welcome to the PF.

What is "unit notation"?

And surely in the Relevant Equation section, you could list the method for converting from rectangular to polar notation, since you are asked to find an angle. And what is the relationship between the position R(t) and the velocity V(t) in general?

You need to show some effort on your schoolwork questions, if you want to receive tutorial help here.