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A fish with weight 35 kg dives and hits the ground (zero height) with kinetic energy equal to 3500J. Find the height through which fish dived. Take g = 10 m/s2

  • a)
    1 km

  • b)
    100 m

  • c)
    10 m

  • d)
    20 m

Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
A fish with weight 35 kg dives and hits the ground (zero height) with ...
We can use the principle of conservation of mechanical energy to solve this problem. According to this principle, the potential energy (PE) at the height is converted into kinetic energy (KE) as the fish dives to the ground.


The formula for potential energy is:


PE=mgh


Where:



  • m=35 kg

  • g=10 m/s^2

  • hhh is the height through which the fish dived (which we need to find)



Given that the kinetic energy when the fish hits the ground is equal to the potential energy it had at the starting height:


KE=PE


3500 J=35×10×h


Now solve for h:


3500=350h


h=3500/350=10 m


So, the height through which the fish dived is 10 meters.


The correct answer is:


3. 10 m.
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Community Answer
A fish with weight 35 kg dives and hits the ground (zero height) with ...
Change in Potential Energy = Kinetic Energy (By Law of Conservation of Energy)
M .g. h = 3500 J
35 . 10.h = 3500
hence
h=10 m___Ans
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