1. If the net force on a hot air balloon is directed straight downward, which wa
ID: 2138868 • Letter: 1
Question
1. If the net force on a hot air balloon is directed straight downward, which way does the acceleration point?
a. downward
b. upward
c. upward only if the balloon is rising
d. upward only if the balloon is falling
e. none of above
2. Forces of 3 N and 6 N act on an object. What is the minimum value for the sum of these two forces? Choose one answer. a. 2N
b. 9N
c. 3N
d. 6N
e. 5N
I'm confused with these two questions, so if anyone has an idea can help me please? Thanks.
Explanation / Answer
F = ma
F - downwards so a - > downwards
2. minimum value is when they act in opposite direction .
then 6-3 = 3 N
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