Question

Certain force acting on 20kg mass changes its velocity 5m/s to 2m/s.calculatre the work done by force​

Answer 1

hᎬᎽᎪ fᏒᎥᎬᏁᎠ !❤️❤️

Answer...

According to the work energy theorem,

W = ∆KE

= ½m(v'² – v²)

where ,

v' = final velocity = 2m/s

v = initial velocity = 5m/s

=½ x 20 x (4-25)

=10 x -21

= -210 J ✓✓

нσρє нєℓρѕ ! ❤️❤️