Ablock on the end of a spring is pulled to position x 5 a and released from rest. in one full cycle of its motion, through what total distance does it travel

20 A

Explanation:

Given

Spring pulled from position

x = 5A

we need to calculate total distance of one full cycle  of spring motion

if you see image below, you understand easily

When cycle complete

Its total distance become 20 A

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.