I'm out playing near a frozen pond. On the pond is a block of ice (initially at rest) with mass 17.0 kg . I slide a different ice block of mass 2.75 kg so that it collides with the stationary block. Just before impact (long after I stopped pushing it), the moving block has speed 6.25 m/s . Ignore friction with the pond. When the blocks collide they stick together and move off as a unit. Required:
What is the change ÎK=KfinalâKinitial in the block-snowball system's kinetic energy due to the collision?

Explanation:

= Mass of block at rest = 17 kg

= Mass of moving block = 2.75 kg

= Velocity of block at rest = 0

= Velocity of moving block = 6.25 m/s

v = Velocity of the combined mass

As the momentum in the system is conserved we get

Change in kinetic energy is given by

THe change in kinetic energy in the system is .

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explanation:

the higher the current the higher the mag field around it the higher the influence on the compass