Okay so this is a "law of conservation of energy" type of question. it's simple but i was absent for a week and im completely lost so i need an explanation.

we rolled a golfball down a ramp (once at 0.3 m and 0.45 m).
the initial potential energy was 0.135 joules (at 0.3 m) and the other initial potential energy was 0.203 joules (0.45 m)

if u need the median times:
0.45 m = 0.91 s
0.3 m = 1.42 s
so my question is.. does the experiment demonstrate law of conservation?
why or why not
and finally if it does.. how? ?

Aballet student who learns with the of his instructor is demonstrating learning.

For problems 1-3, consider a simple dc brush motor with a permanent magnet stator. with an an consider a simple dc brush motor with a permanent magnet ae supply voltage of 100 v, the no-load speed of the motor is 1000 rpm. this motor can provide a torque of 1.9 n-m at 800 rpm drawing a current of 2 a current are both zero at no load.) 1. with an armature supply voltage of 100 v, the motor is operated at 900 rpm. what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input? what is the energy efficiency of the motor? with an armature supply voltage of 100 v, the motor is operated at 1100 rpm (where it acts as a generator). what torque input is required? what mechanical power is required what current is generated? what is the electrical power generated? what is the energy efficiency of the motor acting as a generator? 2. with an armature supply voltage raised to 120 v, the motor is operated at 1000 rpm. what is the no-load speed? what is the motor torque? what is the mechanical power delivered by the motor? what is the current draw? what is the electrical power input what is the energy efficiency of the motor? 3.

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e