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Answer :
The speed of player B before they collide is 2.75 m/s
What is momentum?
Momentum is defined as the product of mass and velocity. It is expressed as
Momentum = mass × velocity
What is impulse?
This is defined as the change in momentum of an object.
Impulse = change in momentum
Impulse = final moment – Initial momentum
How to determine the speed of player B
Since net momentum after the collision is 0 Ns, it means that:
Momentum of A = Momentum of B
With the above, idea, we can obtain the speed of player B as illustrated below:
- Mass of player A = 105 Kg
- Speed of player A = 3.3 m/s
- Mass of player B = 126 Kg
- Speed of player B =?
Momentum of A = Momentum of B
105 × 3.3 = 126 × speed of B
346.5 = 126 × speed of B
Divide both sides by 126
Speed of B = 346.5 / 126
Speed of B = 2.75 m/s
Thus, the speed of player B before the collision is 2.75 m/s
Learn more about momentum:
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