- #1
PAstudent
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Homework Statement
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.
Homework Equations
magnitude= sqrt( quantities squared added together)
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?
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