Energy problems
19.1f your object has a mass of 3kg and you hold it 3.5m above the earth's surface, what
objects potential energy?
al 10.5
b. 102.9)
c. 1.07)
d. 31.5)
hefort

B. 102.9

Explanation:

PE= mgh

PE= (3)(9.8)(3.5)

PE= 102.9

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

: )