Answer :

I think the answer is 60

Answer:

135

Explanation:

m=30kg

initial speed=7.00

final speed=10.0

[tex]ke = \frac{1}{2} m(v - v) {}^{2} [/tex]

  1. [tex]ke = \frac{1}{2} \times 30(10- 7) {}^{2} [/tex]