A block of mass $0.50\;kg$ is moving with speed of $2.00 m/s$ on a smooth surface. It strikes another mass of $1.00 kg$ at rest and they move together as a single body. The energy loss during collision is

Question

$$(a)\;0.67 \;J\quad (b)\;1.00 \;J \quad (c)\; 0.16 \;J \quad (d)\;0.34 \;J$$