An object slides down a frictionless slide from a height of 10 m starting at rest. What is its speed at the bottom? Use g = 9.8 m/s².
A10 m/s
B14 m/s
C20 m/s
D9.8 m/s
Explanation
📌 Conservation of energy: mgh = ½mv². v = √(2gh) = √(2 × 9.8 × 10) = √196 = 14 m/s. Distractor A: used just h; C: forgot square root; D: used g.