The above is not complete. Couldn't find the it online but i have found a similar question which would help you solve the above
Answer:
Explanation:
From the question we are given that
Mass = 70kg
Angle of elevation = 40°
Length of stretch = 3.00 m
Height of performer above floor = Height of the net into the into which he is shot
Time traveled = 2.14 s
Distance traveled = 26.8 m
First obtain the horizontal velocity =
To obtain the initial we would divide the final velocity by the cosine of the angle of elevation
Initial velocity =
Next is to obtain the initial kinetic energy
This is equal to =
Looking at the diagram in the second uploaded the cannon raised the performer before releasing him is
So the potential energy given by the cannon is = mgh
Hence the total energy the band gives the performer i.e the total energy stored in the band is = 9354 +1323 = 10677 Joules
To obtain the Spring constant we would use the stored energy formula
i.e Stored Energy
And we have calculated the stored energy as 10677
Substituting