A ball appears blue outside. When you walk inside, it now looks green. Use reflection to explain why this happened.
1 answer:
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Answer:
F = 56 N
Explanation:
- Assuming that the applied force is parallel to the displacement, according to the definition of work, we can write the following expression for the force required:
Answer:
System D --> System C --> System A --> System B
Explanation:
The gravitational force between two masses m1, m2 separated by a distance r is given by:
where G is the gravitational constant. Let's apply this formula to each case now to calculate the relative force for each system:
System A has masses m and m separated by a distance r:
system B has masses m and 2m separated by a distance 2r:
system C has masses 2m and 3m separated by a distance 2r:
system D has masses 4m and 5m separated by a distance 3r:
Now, by looking at the 4 different forces, we can rank them from the greatest to the smallest force, and we find:
System D --> System C --> System A --> System B