If a 3kg book is lifted from the ground to a height of 5m, how much work is done on the book?

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.

we need to know the time interval during which the force acts. impulse of force = momentum change

do you have a formula possibly