Question

a body of mass 5 kg is thrown vertically upward with a velocity of 20 m per second find initial kinetic energy find the kinetic energy after 2 seconds​

Answer 1

u=20 m/s

a=-10m/s

t=2s

v=u+at

v=20+(-10)*2

v=20-20

v=0

therefore k.e=1/2*m*v2

=1/2*5*0 2

=0J