H2P-45
Conservation of energy
H2 Physics · JC 1 · Easy · Conservation of energy
A 0.40 kg ball is dropped from rest from a height of 6.0 m above the ground. Air resistance is negligible. What is its speed just before it hits the ground? Take g = 9.81 m s⁻².
- 10.9 m s⁻¹
- 7.67 m s⁻¹
- 9.81 m s⁻¹
- 4.90 m s⁻¹
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