Plz.....Tell the correct answer .
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Answer:
ur answer is in the above mentioned photo
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Answer:
Here.. mass = 60 kg,
initial velocity , u = 50 m/s
Since the final velocity is halved.. v= 50/2= 25m/s
Now,
Change in kinetic energy is given by..
Final velocity - initial velocity
or 1/2 × m× v^2 - 1/2 × m× u^2
or 1/2 × 60×25^2 - 1/2 × 60× 50^2
or 1/2×60 (25^2-50^2)
or 30 ( 625 - 2500)
or 30× - 1875
or - 16250 Joule
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