A bullet of mass 20\,g20g is shot from the top of building of height 150\,\,m150m, with a speed of 200\,\,m/s200m/s. It hits the ground with a speed of 150\,\,m/s150m/s. Find the work done on the bullet by air resistance.
Answers
Answered by
0
Answer:
204.4 joul
Explanation:
u=200m/s
w=150m/s =>w²=22500
v=? m=0.02kg
v²=u²+2as
v²=200²+2*9.8*150
v²=42940
Loss of energy
½*0.02*42940-½*0.02*22500
=204.4 joul
Answered by
1
Answer:
-205J
Explanation:
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