Question1

A stone is thrown upward from the edge of a cliff, reaches its greatest height, and next falls down into the valley below. A motion diagram for this situation, start the instant the stone leaves the thrower s hand. Construct corresponding motion graphs taking the acceleration due to gravity as exactly 10 m/s2. Ignore air resistance. In all three motion graphs, unit of time is in seconds and unit of displacement is in meters. In plotting the points, round-off the coordinate values to the nearest integer. Create a graph corresponding to the stone's vertical velocity, vy(t).

Question2

Three positively charged particles, with charges q_1=q, q_2=2q, and q_3=q (where), are located at the corners of a square with sides of length d. The charge q_2 is located diagonally from the remaining (empty) corner.

Establish a magnitude E_net of the net electric field at point P. Use K for the electrostatic constant. State the answer in terms of q, d, and K.