Question
Download Solution PDFA bullet of 10 g is fired with a velocity of 1200 m/s and strikes a wall with a velocity of 400 m/s. The loss in energy while overcoming the resistance of air is-
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is option 3) i.e. 6400 J
CONCEPT:
- Work-energy theorem: The work-energy theorem states that the net work done by the forces on an object equals the change in its kinetic energy.
Work done,
Where m is the mass of the object, v is the final velocity of the object and u is the initial velocity of the object.
CALCULATION:
Given that:
Mass, m = 10 g = 0.01 kg
Initial velocity, u = 1200 m/s
Final velocity, v = 400 m/s
The loss in energy = Work done
⇒ W = 6400 J
Last updated on Jul 4, 2025
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