Conservation of Energy
Energy cannot be created nor destroyed, it can only be converted from one form to another. The total energy of any closed system always remains the same. Energy can change from one form to another, but the total amount of energy always remains the same as long as the system being considered is a closed one. Conservation of energy shows the change between gravitational potential energy and kinetic energies of objects that are rising or falling. When the baseball is being thrown, it produces many different types of energy. Both hitting and fielding display the transferring of energy in a system.
If a baseball player hit a home run 450ft to center field and it reaches a height of 265m with a descending speed of 5m/s What was it's initial speed?
Etotal1=Etotal2
Ep1+Ek1=Ep2+Ek2
mag∆h + 1/2m(Vi*2) = mag∆h + 1/2m(v2*2)
V2*2=2agh1 + 1/2+(V1*2)
V2=2 x 9.8m/s/s x 265m + (5m/s)2
V=72.24m/s
Therefore, the initial velocity was 72.24m/s
Etotal1=Etotal2
Ep1+Ek1=Ep2+Ek2
mag∆h + 1/2m(Vi*2) = mag∆h + 1/2m(v2*2)
V2*2=2agh1 + 1/2+(V1*2)
V2=2 x 9.8m/s/s x 265m + (5m/s)2
V=72.24m/s
Therefore, the initial velocity was 72.24m/s