Two hockey pucks on an ice rink are held together with a compressed spring between them. the pucks are released and the spring pushes them in opposite directions. one puck of mass 0.5 kg moves at 8 m/s. calculate the speed of the other puck of mass 2 kg

so the puck of 2 kg will move in opposite direction with speed 2 m/s

Explanation:

Since two pucks are compressed by the spring between them so there is no external force on this system

so here momentum of the system of two pucks will remains conserved

here we can have

here initially both pucks are at rest

so we can have

now the final speed of 2kg is given as

electrical power

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement