Question

a body of mass 200 grams moves with velocity of 20 metre per second the kinetic energy will be

Answer 1

your answer:-

given:-

mass=200grams------kg

200/1000=0.2kg

velocity =20

we know that

kinetic energy=1/2×mass×velocity×velocity

k.e.=1/2×0.2×20×20=40

Answer 2

kinetic energy or k = (1/2)mv^2

where m=mass,v=velocity

here m=200g = 0.2 kg , v=20m/s

so k=(1/2)*0.2*20*20 = 40 joules