Answer:
Unclear without more information
Explanation:
This is about transfer of energy. If you assume there is no energy lost to the environment (virtually impossible) - then all of the potential energy at the beginning would be transferred to kinetic energy along the route.
So, assuming that the rollercoaster has a velocity of 0 m/s at point A, then you can calculate the potential energy using: 
At the point D, you would assume that the energy is split between some kinetic energy and some potential energy. So, we could say that the total energy is the sum of these: 
If we assume all energy is transferred (ie. no energy lost to friction/heat etc) then we can equate these two and solve:
However, this answer seems unlikely given the drawing - which implies that there is perhaps more information that is missing??
Answer: heavy objects will have a higher terminal velocity than light objects. ... It takes a larger air resistance force to equal the weight of a heavier object. A larger air resistance force requires more speed.) Therefore, heavy objects will fall faster in air than light objects.
Answer:
1) Speed in m/s equals 22.22 m/s.
2) Speed in miles per hour equals 49.712 mph.
Explanation:
Since we know that in 1 kilometer there are 1000 meters and in 1 hour there are 3600 seconds hence we can write
Now we know that 1 mile equals 1.609 kilometer hence we conclude that 1 kilometer equals 
mile
Hence
Answer:
from W-Z.. i think on a swing you get your most potential energy at W and Z is where you go up so Z would be where the kinetic energy increased and W is where potential energy decrease
Explanation:
hope this helps
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