Question

An object of mass 10kg is moving with speed of 4m/s. What is the kinetic energy of the object?

Answer 1

given: m= 10kg   : v = 4m/s

K.E. = 1/2mv²

      = 1/2*10*(4)²

       = 5*16

       = 80 joule

Answer 2

kinetic energy = 1/2 mv sq.
= 1/2 x 10 x 4sq.
= 1/2 x 10 x 16
= 80 joule