Answer:
252 J
Step-by-step explanation:
The potential energy of the rock is the product of its height and its weight:
PE = (mg)h = (12 N)(21 m) = 252 N·m = 252 J
The rock's potential energy is 252 joules.
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Answer:
n=4/3
Step-by-step explanation:
n*(-3/8)=-0.5
n=0.5/3/8
n=1/2 / 3/8
n=4/3
Check:
4/3*-3/8=-0.5
4/3*-3/8=-1/2
-1/2=-0/5
CORRECT!