A mass on a spring moves back and forth 3 times every second. What is the frequency of the mass? What is the period of the mass?
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Ответ:
The final velocity of puck 2 after the collision is 20 m/s .
Explanation:
Let us assume , right direction is positive and left direction is negative .
Given :
Mass of puck 1 and 2 of 0.5 kg and 1 kg respectively .
Initial velocity of puck 1 is 40 m/s .
Initial velocity of puck 2 is 0 m/s .
Final velocity of puck 1 is 0 m/s .
Let , us assume final velocity of puck 2 is
.
Therefore , by conservation of momentum :
Therefore , the final velocity (in m/s) of puck 2 after the collision is 20 m/s .