JEE Main Physics question
A bullet of mass 10 g is fired horizontally with a velocity 1000 ms⁻¹ from a rifle situated at a height 50 m above the ground. If the bullet reaches the ground with a velocity 500 ms⁻¹, the work done against air resistance in the trajectory of the bullet is (g = 10 ms⁻²)
Answer: (C)
Solution
The work done against air resistance equals the loss in kinetic energy of the bullet (the small gravitational height drop is treated as
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