Energy

It varies inversely since heavier objects have more inertia resisting upward displacement force from Earth’s gravity field.

It remains unchanged since only height affects gravitational potential energy per unit mass.

It decreases due to increased gravitational attraction pulling it closer to Earth.

It increases proportionally because potential energy depends linearly on mass.

Electric charge varies as particles may transfer electrons during contact but conserve total due Coulombic interactions ensuring electroneutrality over larger scales.

Mass-energy content fluctuates following Einstein’s equivalence principle $E=mc^2$ adjusting rest masses after impact accounting nuclear binding energies if any occur therein.

Total mechanical energy remains constant due to no external forces doing work on or removing it from the system.

Total momentum changes reflecting individual momentum exchanges but conserves overall thanks to Newton’s third law action-reaction pairs acting internally within system boundaries.

2 m

4 m

3 m

1 m

Temperature

Elastic potential energy

Potential energy

Kinetic energy

W = Fd

W = F + d

W = d/F

W = F/d

Elastic potential energy

Gravitational potential energy

Power

Kinetic energy

The overall resistance decreases.

The overall resistance increases.

The overall resistance remains unchanged.

The overall resistance becomes half of the original resistance.

Elastic potential energy stored within the pendulum string or rod itself.

Thermal energy resulting from air resistance during swing.

Kinetic energy, due to the pendulum's motion reaching maximum speed at the peak.

Potential energy, since height above reference level is greatest at this point.

The kinetic energy doubles.

The potential energy becomes zero.

The total mechanical energy remains constant.

The mechanical energy increases over time.

$\frac{v_0^2}{g}$

$\frac{v_0^2}{4g}$

$\frac{3v_0^2}{4g}$

$\frac{v_0^2}{6g}$