احسبي محصلة أزاحة طالب يتحرك مسافة 40m شمالا ثم يتحرك 20m جنوبا ما محصلة ازاحته وفي اي اتجاه ؟
2 answers:
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The final velocity is 3.47 m/s east
Explanation:
We can solve this problem by using the law of conservation of momentum. In fact, the total momentum of the two players before and after the collision must be conserved:
where:
is the mass of the first player
is the initial velocity of the first player (we take east as positive direction)
is the mass of the second player
is the initial velocity of the second player
is their final combined velocity after the collision
Re-arranging the equation and substituting the values, we find:
So, their velocity afterwards is 3.47 m/s east.
Learn more about momentum:
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