If you are on the top of a mountain and drop an apple, it will fall
to the ground, even though the apple is gravitationally
attracted to you. Why?
Earth is larger and has a much stronger
gravitational pull
b Apples always fall down
Centrifugal forces pull the apple to the Earth and
that is stronger than your gravitational pull
None of these

This is true because it might be gravitationally attracted to you, but it is moving towards the earth, which has a stronger gravitational pull than you do to the apple. You might say why doesn't it go to the sun, well, the sun has a weaker pull than the earth, it is too far away. Now, if you got close enough, it will go to the sun, but both you and the apple will be only ashes.

potential energy is directly proportional to height.

more height = more potential energy.

greatest increase in height = greatest increase in potential energy

where are the points with the greatest increase in height ?

has to be c-e or d-e .

0.11 m/s and 0.28 m/s should be correct