Question:

A bullet of mass 50 g is fired with a speed 100 m/s on a plywood and emerges with 40 m/s. The percentage loss of kinetic energy is :     

(1) 32%

(2) 44% 

(3) 16%

(4) 84%

                                             JEE-2024

Solution:                
A bullet of mass 50 g is fired with a speed 100 m/s on a plywood and emerges with 40 m/s. The percentage loss of kinetic energy is : (1) 32% (2) 44% (3) 16% (4) 84% JEE-2024

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