Asked by Student

In a closed system, an object with a mass of 10 kg moves at a velocity of 5.4 m/s. It collides with a second object that has a mass of 12 kg and that is moving in the opposite direction with a velocity of 3.5 m/s. What is the total momentum of the system after the collision?

(A)12 kg-m/s

(B)66 kg-m/s

(C)42 kg-m/s

(D)54 kg-m/s

My answer is A, but if that's the wrong answer I believe it would be D
Answered by oobleck
why do you think A?
But if it "might be" D, are you just guessing?
I suspect a typo, because I don't like any of the choices.
You show me your work, and I'll show you mine.
Answered by R_scott
the total system momentum does not change

(10 kg * 5.4 m/s) - (12 kg * 3.5 m/s) = ? kg⋅m/s

no typo (that I can see) ... A looks good
Answered by Student
Thank you Scott!
Answered by Celine Bella
Did you get it right?
Answered by sanju
A
P=MV
P= M1V1-M2V2
5.4*10-12*3.5 = 12
Answered by Lana
What is the acceleration of a plane with a net force of 2000N and a mass of 20000kg?
Answered by a dude
sanju is right
Answered by Queen
To R_Scott thank you for explaining it in a way where I could know how to get the answer myself
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