Question

A 20 cm

B 15 cm
C 10 cm
D 5 cm
E 0 cm
If potential energy at point A is 12 joules, what is the potential energy at B?

Answer 1

`Ebp=9J`

Step-by-step explanation:

Potential energy:

`Ep=mgh`

m - mass

h - altitude = 20cm = 0.2 m

`Epa=12=0.2(mg)`

Thus:

`mg=(12)/(0.2)`

`mg=60n`

In Point B:

`Epb=mg(0.15)`

`Epb=60(0.15)`

`Epb=9J`