Achild is standing at the edge of a 50m tall cliff and fires a pellet straight up using a sling-shot. the pellet goes straight up and down but on the downward part of the trajectory just misses the cliff, falling to the ground below.
a) what is the projectile’s maximum height with respect to the ground below the cliff?
b) how long does it take for the projectile to complete its motion?
c) how fast is it moving when it strikes the ground?

Four point charges each having charge q are located at the corners of a square having sides of length a. find symbolic expressions for the following. (a) the total electric potential at the center of the square due to the four charges (use any variable or symbol stated above along with the following as necessary: ke.) vtotal= (b) the work required to bring a fifth charge p from infinity to the center of the square (use any variable or symbol stated above along with the following as necessary: w=