Question

A charge q moves from point A to point B. The potential energy of the charge at point A is 5.3 × 10-10 joules and at point is B is 3.1 × 10-10 joules. If the kinetic energy of the charge at point A is zero, what is the kinetic energy at point B?
Select one of the options below as your answer:

A.
8.4 × 10-10 joules
B.
5.3 × 10-10 joules
C.
3.1 × 10-10 joules
D.
2.2 × 10-10 joules
E.
1.5 × 10-10 joules

Answer 1

change in potential energy = kinetic energy at B - kinetic energy at A
the kinetic energy at A=0
so change in potential energy=kinetic energy at B

Answer 2

P.E. at A+K.E at A=P.E at B+K.E at B
P.E=potential energy and K.E=kinetic energy

Answer 3

What is this mess where my boy fifciol @ :(

Answer 4

imma go with b for whatever