Test Fizika 9 -

Potential energy at top = mgh = 0.2 × 9.8 × 0.3 = 0.588 J. At the bottom, that becomes kinetic energy: ½ mv² = 0.588 → v² = (2 × 0.588) / 0.2 = 5.88 → v = √5.88 ≈ 2.42 m/s.

She remembered her father saying, “Resistance is just friction for electrons.” The wire got warm, but so did her confidence. test fizika 9

She wrote it cleanly, then added a tiny doodle of the box moving right with a smiling arrow. Physics wasn’t magic. It was a tug-of-war with numbers. Potential energy at top = mgh = 0