Question

4. A 900-kg compact car moving at 26.7 m/s has approximately 320,000 Joules of kinetic energy. What is its new kinetic energy if it is moving at 13.3 m/s?​

Answer 1

Answer:

79600.5J

Explanation:

Given parameters:

Mass of compact car  = 900kg

Initial velocity  = 26.7m/s

Energy = 320000J

New velocity  = 13.3m/s

Unknown:

New kinetic energy  = ?

Solution:

Kinetic energy is the energy due to the motion of a body.

   Kinetic energy  = $\frac{1}{2}$  m v²  

 m is the mass

 v is the new velocity

  Kinetic energy  =  $\frac{1}{2}$ x 900 x 13.3²   = 79600.5J