PhysicsWork, energy and powerJAMB
A 2 kg body falls freely from a height of 20 m. Find its speed just before it hits the ground.
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Answer: A. 20 m/s
v = √(2gh) = √(2 × 10 × 20) = √400 = 20 m/s; the mass does not matter.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.