일반물리학 2 — Electric Fields: Problem 23

23 A 10.0 g block with a charge of +8.00 $\times$ 10$^{-5}$ C is placed in an electric field $\vec{E} = (3000\hat{i} - 6000\hat{j})$ N/C. What are the (a) magnitude and (b) direction (relative to the positive direction of the $x$ axis) of the electrostatic force on the block? If the block is released from rest at the origin at time $t = 0$, then at $t = 3.00$ s what are its (c) $x$ and (d) $y$ coordinates and (e) its speed?