Question

M=2kg,h=1m,g=9.8m/s. Find its kinetic energy

Answer 1

here M=2kg , h=s=1m , g=a=9.8m/s at top u =0 m/s
2as = (v)2-(u)2
2×9.8×1 = v2-0
19.6=v2
v=root 19.6
Now ,kinetic energy=1/2mv2
=1/2×2×root 19.6×root 19.6
=1/2×2×19.6
=19.6 J