Question

Compute for the total mechanical energy of a 3.5 kg baseball dropped from a height of 3 meters moving at a speed of 10 m/s.

Answer 1

277.9 J

Step-by-step explanation:

We are given that

Mass,m=3.5 kg

Height=3 m

Speed,v=10 m/s

Kinetic energy of baseball=
`K.E=\frac{1}2}mv^2`

`K.E=(1)/(2)(3.5)(10)^2=175 J`

Potential energy of baseball=P.E=mgh

g=
`9.8m/s^2`

Substitute the values

Potential energy of baseball=
`3.5* 9.8* 3=102.9 J`

Total mechanical energy=K.E+P.E

Total mechanical energy=175+102.9=277.9 J