- #1

- 84

- 0

## Homework Statement

The vector position of a 3.15 g particle moving in the xy plane varies in time according to the following equation.

r1 = (3i+3j)t + 2jt^2

At the same time, the vector position of a 5.00 g particle varies according to the following equation.

r2= 3i-2it^2 -6jt

For each equation, t is in s and r is in cm. Solve the following when t = 2.50:

(a) Find the vector position of the center of mass.

i cm

j cm

(b) Find the linear momentum of the system.

i g-cm/s

j g-cm/s

(c) Find the velocity of the center of mass.

i cm/s

j cm/s

(d) Find the acceleration of the center of mass.

i cm/s2

j cm/s2

(e) Find the net force exerted on the two-particle system.

i μN

j μN

## Homework Equations

im really not sure about this

i think for some of them you would use p=mv

and for the center of mass you use 1/M integral of r??

## The Attempt at a Solution

im not sure what to do first

am i plugging in for t first? and then what do i do?