1. The problem statement, all variables and given/known data Vector P is a function of time t. In a specified coordinate system P is given by: P= (A+Bt)i + (A+Ct-Dt^2)j and P is in meters when t is seconds Given these values (shown without their units): A=15.0, B=7.00, C=20.0, D=4.00 (a) Calculate the time when P points in the +x direction. (b) Calculate the magnitude of P at the time calculated in part a. (c) Calculate the time when P make an angle of -45 degrees with the +x axis. (d) Calculate the magnitude of P at the time calculated in part c. 2. Relevant equations magnitude= sqrt( quantities squared added together) 3. The attempt at a solution I am mostly confused on part a and c. So for a, would you find where t=0 in the j direction which would leave you with only the i direction which is the +x? For part c, would have something to do with dot product because it includes an angle of 45 degrees?