Aquarterback throws a football with an initial velocity v at an angle θ above horizontal. assume the ball leaves the quarterback’s hand at ground level and moves without air resistance. all portions of this problem will produce algebraic expressions in terms of v, θ, and g. let the origin of the cartesian coordinate system be the ballʼs initial position.
(a): write an expression for the magnitude of the football’s initial vertical velocity v0y.
(b): find an expression for the magnitude of the football’s initial horizontal velocity v0x.

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.