Question

A6 kg object has 270J of kinetic energy. How fast is it moving? Ek =
(V)mv2 (rearrange equation)
90 m/s
31 m/s
91 m/s
89 m/s

Answer 1

Answer:

9.5m/s

Explanation:

Given parameters

Mass of object  = 6kg

Kinetic energy  = 270J

Unknown:

Velocity  = ?

Solution:

The kinetic energy of a body is the energy due to the motion of that body.

It is expressed as;

     k.e  = $\frac{1}{2}$ m v²  

m is the mass

v is the velocity

  So;

             270  =  $\frac{1}{2}$ x 6 x v²

               270 = 3v²

                 v² = 90

                 v = 9.5m/s