Questions
A projectile is fired with a speed less than the escape speed. Its mechanical energy is :
a
positive at all positions
b
negative at all positions
c
positive at all positions except the highest point where it is zero
d
none of the above
detailed solution
Correct option is B
For a bounded system, total mechanical energy is negative at all positions.E=K+U=12mv2-GMmR=12mv2-ve2. Since vTalk to our academic expert!
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