PROBLEM SOLVING - tempat bertanya PR Kaskuser (SD, SMP, SMA) - Part 3
(1). menurut hukum kekekalan energi, ΔE = 0 ½ m v² - ½ I ω² - m g h = 0 ½ m v² - ½ (½ m r²)(v/r)² - m g S sin θ = 0 S = v² csc θ/(4g) S = (10²/0.6)/(4 * 10) S = 4.17 meter (2). R = Fa + Fb R = kQa Qc/r² {cos 45°, sin 45°} + kQb Qc/r² {cos 135°, sin 135°} R = (9