(a) A mass m is placed within a gravitational field gk, where k points vertically upward. What is the force on the mass m?

(b) A charge q is placed within an electric field Ek, where k points vertically upward and E > 0 is the magnitude of the field. What is the force on the charge q? What if you reversed the direction of the electric field, so that it is now given by Ek with E > 0?

(c) If the mass m from part (a) is a height h above the ground, what is its potential energy? (Remember, you define potential energy relative to some point, and in particular, you can set the PE to zero at the ground.)

(d) If the charge q from part (b) is a height h above the ground, what is its potential energy? What is the electric potential a height h above the ground? (Again, relative to the ground.) What if you reversed the direction of the electric field, so that it is now given by Ek with E > 0?

(e) Consider 2 point charges of equal charge q placed on the x axis at x = D and x = d + D. What is the electric potential at the origin?

(f ) Consider a stick of length d with charge density per unit length , where the right hand end is located a distance D from the origin. What is the electric potential at the origin?

(a) A mass m is placed within a gravitational eld 791}, where )2: points vertically upward. What is the force on the mass m? (b) A charge q is placed within an electric eld Ell:, where all: points vertically upward and E > 0 is the magnitude of the eld. What is the force on the charge q? What if you reversed the direction of the electric eld, so that it is now given by E k with E > 0'? (c) If the mass m from part (a) is a height h above the ground, what is its potential energy? (Remember, you dene potential energy relative to some point, and in particular, you can set the PE to zero at the ground.) ((1) If the charge (1 from part (b) is a height it above the ground, what is its potential energy? What is the electric potential a height h ab0ve the ground? (Again, relative to the ground.) What if you reversed the direction of the electric eld, so that it is now given by E}; with E > 0? (e) Consider 2 point charges of equal charge 9 placed on the :1; axis at a: = D and :1: = d + D. What is the electric potential at the origin? (f) Consider a stick of length d with charge density per unit length A, where the right hand end is located a distance D from the origin. What is the electric potential at the origin