Question

What is k.E of. The body mass 5 kg and is its momentum 15kg m/s

Answer 1

given that,

                mass of a body            = 5 kg

                momentum of a body  = 15 kgm/s

                K.E of the body            = ?

Formula

                                     K.E=P²/2m

  by substuting the data in the formula

                                     K.E  =  (15)²/2×5

                                              = 225 / 10

                                             = 22.5 J (or) 22.5×10^7 erg                                      

Answer 2

Kinetic energy of the body is 22.5 Joule.

Explanation:

• Kinetic energy is defined as a form of energy in which an object or a particle has by reason for its motion.
• When work transfers energy, It is done on an object by applying a force on the object which speeds up and thus gains kinetic energy.
• Kinetic energy is an expression which shows the fact that a moving object can perform work if anything hits on.

Given the mass of a body = 5 kg

               momentum of a body  = 15 kgm/s

              K.E of the body            = ?

Formula

            $K.E=P^{2} /2m$

 by substituting he data in the formula

               K.E  = $\frac{15^{2} }{y}$×$5$

                K.E   $= 225 / 10$

                K.E  $= 22.5 J$        

Kinetic energy of the body is 22.5 Joule.