Aprojectile is fired straight upward from the earth's surface at the south pole with an initial speed equal to one third the escape speed. (the radius of the earth is 6.38 106 m.)
(a) ignoring air resistance, determine how far from the center of the earth the projectile travels before stopping momentarily. m
(b) what is the altitude of the projectile at this instant? m

Which are examples of projectile motion? choose all that apply a. a soccer ball rolling across the ground in the northeast direction b. a car turning a corner, so it is heading south c. a javelin flying through the air d. a tennis ball lobbed over the net

The dot diagram represents the motion of the motorcycle as it moves from left to right

Two 1.20-m nonconducting wires meet at a right angle. one segment carries + 2.50 µc of charge distributed uniformly along its length, and the other carries - 2.50 µc distributed uniformly along it, as shown in fig. 21.50. ( a. find the magnitude and direction of the electric field these wires produce at point p, which is 60.0 cm from each wire. ( b. if an electron is released at p, what are the magnitude and direction of the net force that these wires exert on it?