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2. Before 0.5-kg ball is dropped from a third story window 20 m above the sidewalk. What is the potential energy of the ball? a. 4 J b. 9800 J C. 98 J d. 150 J
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1 vote
2. Before 0.5-kg ball is dropped from a third story window 20 m above the sidewalk. What is the potential

energy of the ball?
a. 4 J
b. 9800 J
C. 98 J
d. 150 J

User Antsyawn
by
4.7k points

2 Answers

3 votes
(C). Pe=mgh
Pe=(.5kg)(10m/s^2)(20m)
Pe= 100J≈ 98J using 9.8 for G
User Uke
by
4.8k points
4 votes

Answer:

C

Step-by-step explanation:

C

20*9.8*0.5

98

User Phhu
by
5.3k points
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