Answer:
Height of the stadium is 24 m
Explanation:
We have given weight of the rocket mg = 10 N
Total mechanical energy is given = 280 J
Kinetic energy is given Ke = 40 J
We have to find the height of stadium
Mechanical energy is the sum of potential energy and kinetic energy
So potential energy is equal to = 280-40 =240 J
So
h = 24 m
So height of the stadium is 24 m
The decrease in gravitational potential energy of the system is given by
where
m is the mass, g is the gravitational acceleration, and is the variation of height of the system.
also corresponds to the weight of the diver, therefore if we rearrange the equation and we use and , we can find her weight:
The answer is B
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