Question

LOOK AT THE PICTURE!! 3
Please answer properly

Answer 1

The total energy at A, B and C is constant and does not change.

At A, all the energy is potential energy. It gets converted partially to kinetic energy at B and is completely converted to kinetic energy at C. At C, all the energy is kinetic energy.

Answer 2

Highest point  ( A ) ...

Not moving       ==> zero kinetic energy
Highest altitude ==> maximum potential energy
                               ------------------------------------       
Total energy      ==> all potential


Halfway up, halfway down  ( B ) ...

Half-altitude  ==>  half of total energy is potential 
Moving         ==>  some kinetic energy; must be half of total
                          -----------------------------------------
Total energy  ==>  same total; half potential, half kinetic


Lowest point  ( C ) ...

Minimum altitude  ==>  zero potential energy 
Fastest speed      ==>  maximum kinetic energy
                          -----------------------------------------
Total energy         ==>  same total; no potential, all kinetic