Answer:
277.9 J
Explanation:
We are given that
Mass,m=3.5 kg
Height=3 m
Speed,v=10 m/s
Kinetic energy of baseball=[tex]K.E=\frac{1}2}mv^2[/tex]
[tex]K.E=\frac{1}{2}(3.5)(10)^2=175 J[/tex]
Potential energy of baseball=P.E=mgh
g=[tex]9.8m/s^2[/tex]
Substitute the values
Potential energy of baseball=[tex]3.5\times 9.8\times 3=102.9 J[/tex]
Total mechanical energy=K.E+P.E
Total mechanical energy=175+102.9=277.9 J
