NDA 2019 Physics question
A rigid body of mass 2 kg is dropped from a stationary balloon kept at a height of 50 m from the ground. The speed of the body when it just touches the ground and the total energy when it is dropped from the balloon are respectively (acceleration due to gravity )
Answer: (D)
Solution
Speed on reaching the ground: \sqrt{2gh}\sqrt{2 × 9.8 × 50}\sqrt{980}$\
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