Question

please tell me of this question

Answer 1

kinetic energy= 1/2 ×m×v^2
=1^2 ×0.5 kg × 2×2
=1 joules

Answer 2

we know that kinetic energy=1/2mv^2
so,here m=0.5kg v=2m/s
k.e=1/2×5/10×4
=1joule.