<span>A.frictional effects dissipate energy.</span>
Answer:
Yes, when an apple falls towards the earth, the apple gets accelerated and comes down due to the gravitational force of attraction used by the earth. The apple also exerts an equal and opposite force on the earth but the earth does not move because the mass of the apple is very small, due to which the gravitational force produces a large acceleration in it (a = F/m) but the mass of the earth is very large, the same gravitational force produces very small acceleration in the earth and we don't see the earth rising towards the apple.
If you try to fit the edges of both continents than they should somewhat fit each other like puzzle pieces
It is trajectory acceleration. A friction track is a device to study motion in low friction environments, I believe. Does this help?
It honestly depends. Fossil fuels are non-renewable so if reserves are depleting there is a threat of them running out and/or more pollution.
