Question

The kinetic energy of an object can be determined using the equation , where is the kinetic energy, is the mass, and is the speed of the object. What is the mass of an object moving at a speed of 12 that has 36 J of kinetic energy?

Answer 1

Answer:

0.5kg

Explanation:

Given parameters:

Speed of the object  = 12m/s

Kinetic energy  = 36J

Unknown:

Mass of the object  = ?

Solution:

Kinetic energy is the energy due to the motion of a body. It is mathematically expressed as;

     K.E = $\frac{1}{2}$ m v²  

 Insert the parameters and solve;

    36  =  $\frac{1}{2}$ x m x 12²

     36  = 72m

       m  = 0.5kg