Question

What’s the velocity of an 11-kilogram object with 792 joules of kinetic energy? Use . 7 m/s

Answer 1

12 m/s is the answer

Answer 2

12 m/s

Step-by-step explanation:

Hello

Kinetic energy is the energy associated with bodies that are in motion,it depends on the mass and speed of the body and is given by

`E_(k) =(m*v^(2) )/(2)`

where m is the mass of the object , v is the velocity of the object and E is the kinetic energy

also

`1 joule = (Kg*m^(2) )/(s^(2) )`

Now, isolating and replacing

`E_(k) =(m*v^(2) )/(2)\\(E_(k))/(m) =(v^(2) )/(2) \\v^(2) =(2*E_(k) )/(m)\\ v=\sqrt{(2*E_(k) )/(m)}\\\\ v=\sqrt{(2*792(kg*m^(2) )/(s^(2) )  )/(11 kg)} \\v=\sqrt{144 (m^(2) )/(s^(2) ) } \\v=12 (m)/(s)`

v=12 m/s

Have a great day