How has two dogs go awnser my other qestion first one will get brainly anser
1 answer:
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Answer:
a) 1.67 m/s
b) 23kJ
Explanation:
We need to apply the linear momentum conservation formula, that states:
in this case:
the initital kinetic energy is:
and the final:
The energy lost is given by:
When the ball reaches its original position, it will have the same speed (but would be traveling in the opposite direction). So the average speed is
regardless of how long the ball was in the air.